00279nam a2200097Ia 4500008004100000082003400041100002200075245004900097260002700146300000800173140113s9999    xx            000 0 und d  a63:551.588+631.92(082.2)   K7  a"Brade, Nyle. C."  aAgriculture & the Quality of our environment  a1967bAAAScWashington  a460