000 00267nam a22000977a 4500
082 _a612.9430
_bVAR/V
245 _aVariations in the incidences of knowledge and use of contraception /
260 _aNewYork :
_bUnited Nations,
_c1981.
300 _a161p. :
942 _cBK
999 _c305922
_d305922