IOBC-WPRS Bulletin Vol. 20 (5) 1997

Commission "IP-Guidelines and Endorsement":
Guidelines for integrated production of arable crops in Europe, IOBC Technical guideline III, Wadenswil (Switzerland); 12-13 April, 1997.
Edited by: E. F. Boller, C. Malavolta, E. Jörg.
ISBN 92-9067-090-8 [115 pp.].