@book{2915,
	author = {Hatcher, Robert A. and Rinehart, Ward. (Editor)},
	title = {The essentials of contraceptive technology},
	publisher = {Johns Hopkins INFO Project ,},
	year = {1997 .},
	address = {Washington :},
	url = {https://books.google.com.pk/books?id=ER5vN9nN-tcC&printsec=frontcover&dq=The+essentials+of+contraceptive+technology&hl=en&sa=X&redir_esc=y#v=onepage&q=The%20essentials%20of%20contraceptive%20technology&f=false}
}