Merck's Index: Encyclopedia for the chemist, Pharmacist and Physician / 
s.n. 
 - 4 ed. 
 -  Merck & Co.Inc, Newyork,  1930 
 - p. ;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Technology (Applied sciences) - Dictionaries & encyclopedias
<br/><br/><label>Dewey Class. No.: </label>R 603 MER4