Ecological agriculture and sustainable development: proceeding
DHALIWAL, G. S
Ecological agriculture and sustainable development: proceeding - Ludhiana 1998 - 2V
AGRICULTURAL ECOLOGY -- CONGRESS
AGRICULTURAL ECOLOGY -- CONGRESS AGRICULTURAL ECONOMIC ASPECTS
630.274 5 I-5E
Ecological agriculture and sustainable development: proceeding - Ludhiana 1998 - 2V
AGRICULTURAL ECOLOGY -- CONGRESS
AGRICULTURAL ECOLOGY -- CONGRESS AGRICULTURAL ECONOMIC ASPECTS
630.274 5 I-5E