Ecological agriculture and sustainable development: proceedings
DHALIWAL, G. S
Ecological agriculture and sustainable development: proceedings - Ludhiana 1998 - 2v
AGRICULTURAL ECOLOGY -- CONGRESSES
AGRICULTURAL ECOLOGY -- CONGRESSES AGRICULTURE -- ECONOMIC ASPECTS -- CONGRESSE
SOILS 630.274 5 I-5E
Ecological agriculture and sustainable development: proceedings - Ludhiana 1998 - 2v
AGRICULTURAL ECOLOGY -- CONGRESSES
AGRICULTURAL ECOLOGY -- CONGRESSES AGRICULTURE -- ECONOMIC ASPECTS -- CONGRESSE
SOILS 630.274 5 I-5E