00339nam a2200121Ia 4500008004100000082001700041100002900058245003100087260003000118300001400148600003300162650002200195140224s9999    xx            000 0 und d  a631.584.5 M6  aFrancis, Charles A., ed.  aMultiple cropping systems/  aNew YorkbMacmillanc1986  axiv,383p.  aedited by A. Francis Charles  aMultiple cropping