Publisher: Deutsche Gesellschatt fur Technische Zusammenarbeit (GTZ) GmbH (German Agency for Technical Cooperation) Post Box 5180 Dag-Hammarskjöld-Weg 1 D-6236 Eschborn 1 Federal Republic of Germany Telephone: 061 96/79-0 Telex: 41523-0 (gtz d)

Editorial Committee:

Peter Baz, Hans-Wilhelm von Haugwitz, Wolfgang Morbach, Thomas Neumaier, Berthold Pilz

Focus in this issue:

Detlev Ullrich, GTZ Division 4020

Editor:

Beate Wörner

Editorial Assistant:

Henriette Mende

Named contributions do not necessarily represent the views of the publisher or the editorial staff.

Reproduction is permitted after consultation; copies should be supplied. ISSN 0723-Z225