China, azolla propagation and small-scale biogas technology: Report on an FAO/UNDP study tour to the People's Republic of China, 21 May-11 June 1978 (FAO soils bulletin)

by Food and Agriculture Organization of the United Nations

Paperback

ISBN: 978-92-5-100721-1

ISBN-10: 92-5-100721-7

Food and Agriculture Organization · 1978