00283nam a2200097Ia 450000500170000000800410001705000150005810000200007324500460009326000460013920251229184435.0251229s9999    xx            000 0 und d  aHB 171 .T5  aTinbergen, Jan. 4aThe design of development.cJan Tinbergen  aBaltimoreb The Johns Hopkins Pressc1958