Chatterjee, B.N. . Cropping system: theory and practice / B.N. Chatterjee and S. Maiti. - New Delhi : Oxford and IBH Publishing , 1984. - xii,326p. : ill.,figs.,table ; 22cm . NULL ISBN: Rs. 20.50 (Pbk) Subjects--Index Terms: CROPPING SYSTEM Dewey Class. No.: 631.58 / CHA/C