Soil organic matter management for sustainable agriculture: a workshop held in Ubon, Thailand, 24-26 August 1994 editor RDB Lefroy; G.J.Blair; E.T. Craswell text Canberra ACIAR 1994 Ind [ACIAR Proceedings, No. 56] [ACIAR Proceedings, No. 56] SOIL BIOLOGY SOIL MANAGEMENT TRAINING COURSES URN:ISBN:ISBN: 1-86320-139-4