@book{7722,
	author = {Harrison, Tinsley Randolph.},
	title = {Harrison's principles of internal medicine},
	publisher = {Mc GRAW-HILL ,},
	year = {1992 .},
	address = {New York :},
	edition = {13th ed.},
	url = {https://books.google.com.pk/books?id=pJ87PgAACAAJ&dq=0071133828&hl=en&sa=X&redir_esc=y}
}