The international pharmacopoeia 

 - 3rd ed. 
 - Geneva  World Health Organization  1994 
 - 343 p. ; 24 cm. 
<br/><br/>v.4: Tests, methods and general requirements 
<br/><br/><label>ISBN: </label>9241544627 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Drugs--Analysis<br/>Drugs--Standards