@book{77107,
	author = {Bhushan, Vikas.},
	title = {First aid for the USMLE step 1, 2019 :},
	publisher = {McGraw-Hill Medical Pub. Div.,},
	year = {c2019.},
	address = {New York :},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/description/mh051/2004299051.html}
}