@book{7660,
	author = {Athey, Patrica Ann. and  Frank P. Hadlock (Editor)},
	title = {Ultrasound in obstetrics and gynecology },
	publisher = {Mosby ,},
	year = {1981 .},
	address = {T. Loius :},
	url = {https://www.abebooks.com/9780801603747/Ultrasound-obstetrics-gynecology-Athey-Patricia-0801603749/plp}
}