00440nam a2200133Ia 4500008004100000082002600041100001900067245007100086260003700157300001000194600004200204600003500246650002500281140224s9999    xx            000 0 und d  a631.95:63.002(100) L9  aCox, George W.  aAgricultural ecology: an analysis of world food production systems  aSanfranciscobW.H. Freemanc1979  a721p.  a George W.Cox (and) Michael D.Alkins.  aAtkins, Michael, D., jt. auth.  aAgricultural ecology