00603nam a2200241Ia 4500 150901s9999 xx 000 0 und d 9780521477034 English 630 CON/CR Cassman Kenneth g Connor David J Loomis Robert s Author Crop ecology: productivity and management in agricultural systems Usa Cambridge university 2011 515 Pages 4419.77/- Crop ecology BK 244040 244040 0 0 0 0 KAUCOA KAUCOA 2022-03-03 4419.77 7 630 CON/CR KAU-COA-30446 2020-02-03 00:00:00 2020-02-03 2015-09-16 BK