00605nam a2200121Ia 4500008004100000040001700041082002500058110007600083245012100159260003500280300002500315650014300340190328s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221sta613.9406bU58M  aUnited Nations. Department of International Economic and Social Affairs 0aMeasuring the dynamics of contraceptive usebproceedings of the United Nations Expert Group Meeting (1988: New York)  aNew YorkbUnited Nationsc1991  axii, 201p+tab+graphs  aPopulation-Statistics-United States; Statistics and dynamics (Social Sciences); Contraception-Untied Statres; Contraceptives-United States