Books available in CES library
- K.S. Manilal and C. Sathish Kumar (1994) A Catalogue of Indian Orchids. Bishen Singh Mahendra Pal Singh, Dehradun. F. Boyle (1994) About Orchids: A chat. Bishen Singh Mahendra Pal Singh, Dehradun
- Keshab R. Rajbhandari and Sushila Bhattarai 2001 Beautiful Orchids of Nepal. Keshab R. Rajbhandari, Kathmandu.
- J.D. Hooker (1978) Century of Indian Orchids. International Book Distributors Dehradun.
- Lindley (1982) Contributions to the Orchidology of India. Bishen Singh Mahendra Pal Singh, Dehradun.
- Cultivation of Medicinal Plants and Orchids in Sikkim Himalaya. (1995) Bishen Singh Mahendra Pal Singh, Dehradun.
- Purshotam Kaushik (1983) Ecological and Anatomical Marvels of the Himalayan Orchids. Today & Tomorrow's Printers and Publishers, New Delhi.
- Flora of India Series: Series I: Fascicle 5: Orchidaceae-Genus: Coelogyne. Botanical Survey of India, Kolkata.
- P.A. Bruhl (1993) Guide to the Orchids of Sikkim. Bishen Singh Mahendra Pal Singh, Dehradun.
- H.J. Chowdhery and G.D. Pal (1997) Higher Plants of the Indian Subcontinent: Orchidaceae of Arunachal Pradesh: Checklist (Vol. 7). Bishen Singh Mahendra Pal Singh, Dehradun.
- Tirtha Bahadur Shrestha and Rene de Milleville (2004) Nepal Orchids in Pictures. Malla Prakashan, Kathmandu
- G. Bentham (1985) Notes on Orchideae. Bishen Singh Mahendra Pal Singh, Dehradun.
- F.A.E. Price (2003) Orchid Culture: In Ceylon and the East. Asian Educational Services, New Delhi.
- H.J. Chowdhery (1998) Orchid Flora of Arunachal Pradesh. Bishen Singh Mahendra Pal Singh, Dehradun.
- Iswar Chandra Barua (2001) Orchid Flora of Kamrup District, Assam. Bishen Singh Mahendra Pal Singh, Dehradun.
- Gunnar Seidenfaden (1990) Orchid Genera in Thailand: Bulbophyllum Thou (Vol. VIII). Bishen Singh Mahendra Pal Singh, Dehradun.
- Orchid Memories: A Tribute to Gunnar Seidenfaden (2004). Mentor Books, Calicut.
- R.A. Rolfe (1986) Orchid Stud-Book. Bishen Singh Mahendra Pal Singh, Dehradun.
- W. Fawcett (1982) Orchidaceae: Flora of Jamaica (Vol. 1). Bishen Singh Mahendra Pal Singh, Dehradun.
- J.S. Gamble (1984) Orchidaceae: In Flora of the Presidency of Madras. Bishen Singh Mahendra Pal Singh, Dehradun.
- Orchids in India (2000). Scientific Publishers (India), Jodhpur.
- B. Grant (1995) Orchids of Burma: Including the Andaman Islands. Bishen Singh Mahendra Pal Singh, Dehradun.
- T.K. Bose and S.K. Bhattacharjee (1999) Orchids of India. Naya Prokash, Kolkata.
- Johns Augustine., Jauti Sharma and Yogendra Kumar (2001) Orchids of India – II: Biodiversity and Status of Bulbophyllum Thou. Daya Publishing House, Delhi.
- Jauti Sharma (1996) Orchids of India: Commercialization and Conservation Daya Publishing House, Delhi.
- S.S. Samant and Y.P.S. Pangtey (1991) Orchids of Kumaun Himalaya. Bishen Singh Mahendra Pal Singh, Dehradun.
- M.B. Raizada (1981) Orchids of Mussoorie. Bishen Singh Mahendra Pal Singh, Dehradun.
- S.K. Kataki and T.M. Hynniewta (2000) Orchids of Nagaland. Botanical Survey of India, Kolkata.
- H.B. Naithani and S.C. Deorani (1995) Orchids of Nagaland. Oriental Enterprises Dehradun.
- M.L. Banerjee (1992) Orchids of Nepal. International Bioscience Publishers, Hisar.
- J. Joseph (1987) Orchids of Nilgiris. Botanical Survey of India, Kolkata.
- J.F. Duthif (1979) Orchids of Northwestern Himalaya. Bishen Singh Mahendra Pal Singh, Dehradun.
- Sarat Misra (2004) Orchids of Orissa. Bishen Singh Mahendra Pal Singh, Dehradun.
- G. King (1998) Orchids of Sikkim Himalaya. Bishen Singh Mahendra Pal Singh, Dehradun.
- R.N. Sehgal., Promila Pathak and Navdeep Shekhar (2001) Orchids: Science and Commerce. Bishen Singh Mahendra Pal Singh, Dehradun.
- G.W. Dillon (1986) Proceedings of the Second World Orchid Conference, Sept. 19-23, 1957. Hono. Bishen Singh Mahendra Pal Singh, Dehradun.
- O. Ames (1983) Schedulae Orchidianae. Bishen Singh Mahendra Pal Singh, Dehradun.
Books available in CES library
• Abraham; Vatsala (1981) Introduction to orchids . Tropical Botanical Garden and Research Institute, Trivandrum.
• Biology conservation & culture of orchids . (1986) East West Press Private Limited, Bangalore.
• Joseph,J. (1987 ) Orchids of Nilgiris . Botanical Survey of India, Calcutta.
• Endemic orchids of the Western Ghats report 2001 (Conservation assessment and management plan (C.A.M.P.) workshop) . Wildlife Information Liaison Development (WILD) Society / Zoo Outreach Organisation.
• Hooker,J.D. (1885 ) Flora of British India vol.5 International Book Distributors, Dehra Dun.
• Hooker,J.D. (1894 ) Flora of British India vol.6 . International Book Distributors, Dehra Dun.
• Biology conservation & culture of orchids . (1986) East West Press Private Limited, Bangalore.
• Dressler,R.L. (1993 ) Phylogeny and classification of the orchid family . Cambridge University Press, Cambridge.
• HMSO (1994) Proceedings of the 14th World Orchid Conferencev HMSO Publications, Edinburgh.
• Biodiversity of eastern Himalayan protected areas . (2003) Department of Botany, Handique Girl's College, Guwahati.