TY - BOOK AU - Nair, K. Balakrishnan, ed. ED - Symposium on Cropping Patterns in India : TI - Proceedings of the symposium on cropping patterns in India held at Delhi on January 27th-31st, 1968 U1 - 631.580954 21st ed PY - 1972/// CY - New Delhi PB - Indian Council of Agricultural Research KW - Cropping systems ER -