00336nam a2200109Ia 450000500170000008000180001710000220003524501010005726000390015830000100019758300190020720260716043052.0  a03.01.02 W927  aCaldwell, John C.  aSoft underbelly of development : demographic transition in conditions of limited economic change  bWorld BankaWashington, DCUSc1990  a55 p.  c3/7/00kM2LMGR