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Rushwan, H. E.,Ferguson, J. G., Jr.,Bernard, R. P.. Hospital counseling in Khartoum: a study of factors affecting contraceptive acceptance after abortion. Int J Gynaecol Obstet. 1978. 15:440-3

Bertrand, J. T.,Bogue, D. J.,Mendoza Tobar, S.. A communication experiment to increase the demand for voluntary surgical contraception in El Salvador. Fam Plann Resume. 1978. 2:135-41

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