@book{7635,
	author = {Ratnam, S. Shan.(editor)},
	title = {Contraception : the proceedings of the 12th World Congress on Fertility and Sterility, Singapore, October 1986},
	publisher = {Parthenon,},
	year = {1987.},
	address = {UK :},
	url = {https://books.google.com.pk/books?id=TJmQQgAACAAJ&dq=0940813211&hl=en&sa=X&redir_esc=y}
}