@book{2855,
	author = {Wynn, Ralph M.},
	title = {Obstetrics and gynecology :the clinical core },
	publisher = {Lea & Febiger ,},
	year = {1992 .},
	address = {Malvern :},
	edition = {5th ed.},
	url = {https://books.google.com.pk/books?id=WO61GDC17u8C&q=0812115651&dq=0812115651&hl=en&sa=X&redir_esc=y}
}