First aid for the USMLE step 1 :  a student-to-student guide / 
 First aid for the United States Medical Licensing Examination step one 2021. 
editors, Tao Le [and eight others] 
 - 31st edition (International edition). 
 - New York :  McGraw Hill,  [2021]. 
 - xxii, 828 p.  color illustrations  28 cm. 
<br/><br/><label>ISBN: </label>9781260469394 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Clinical medicine.--Examinations<br/>Educational measurement<br/>Medicine.
<br/><br/><label>LC Class. No.: </label>W26.5  / .F527