@book{2043,
	author = {Hatcher, Robert A and World Health Organization},
	title = {The Essentials of contraceptive technology :},
	publisher = {Population Information Program, Johns Hopkins University, School of Public Health, },
	year = {1997.},
	address = {Baltimore, MD :},
	url = {https://apps.who.int/iris/handle/10665/42331}
}