Universal Decimal Classification :  UDC 57 biological sciences in general, virology, microbiology 

 - 2. ed 
 - 59 p. 
 - FID publication ; n.483 .
<br/><br/><label>ISBN: </label>0-580-10965-8 
<br/><br/><label>Subjects--Corporate Names: </label><br/>International Federation for Information and Documentation
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biologia<br/>Virologia<br/>microbiologia
<br/><br/><label>Universal Decimal Class. No.: </label>025.45CDU  / F293u