The Merck Index  an encyclopedia of chemicals and drugs 

 - 9th ed 
 - Merck & Co. Inc., (s.l.)  1976 
 - xv,1957 
<br/><br/><label>ISBN: </label>911910-26-3 
<br/><br/><label>Dewey Class. No.: </label>R547.03 M.I.