00270nam a2200097Ia 450000500170000000800410001705000150005810000130007324500520008626000340013820251229192550.0251229s9999    xx            000 0 und d  aSB 415 .R4  aRess,A R 0aCROP PROCESS IN CONTROLLED ENVIRONMENTScR Ress  aLondonb Academic pressc1972