00545nam a2200169Ia 4500082002100000100006400021245008600085260003500171300001300206500000500219690000600224700000500230952010200235964001700337921000800354999001300362  a304.632bUn58.HF  aUnited Nations, Economic and Social Affairs, Department of-  aHuman fertility and national development; a challenge to science and technologyb  aNew YorkbUnited Nationsc1971  ax, 140p.  a  a   a  00104070aISIbISId1998-05-27l0o304.632 Un58.HFpDP5284r2019-02-14 00:00:00w2019-02-14yBK  abcdefg  a310  c310d310