01093cam a2200289 i 4500 4144419 BD-DhUL 20201103141152.0 771018s1974 th b i000 0 eng 77366353 DLC BD-DhUL BD-DhUL a-pk--- JX1977 .A2 E/CN.11/1119 HQ766 301.426 UNS Potter, Robert G. Some techniques for measuring the impact of contraception / [by Robert G. Potter and S. L. N. Rao] ; Economic and Social Commission for Asia and the Pacific. Bangkok : United Nations, 1974. v, 136 p. ; 28 cm. Asian population studies series ; no. 18 no. 18 Includes bibliographical references. Birth control Mathematical models. Birth control Pakistan Mathematical models. Rao, S. L. N. (Sethuramaiah Lakshminarayana N.), 1942- joint author. United Nations. Economic and Social Commission for Asia and the Pacific. ddc REF 174364 174364 0 0 ddc 0 301_426000000000000_UNS 1 REF 310458 DUL DUL UNC 2017-04-09 Gift 301.426 UNS D7696 2017-04-09 2017-04-09 REF