Selwyn, Sidney <br/><br/>
The Beta-lactum antibiotics :  penicillins and cephalosporins in perspective / 
by Sydney Selwyn contribution ; R. W. Lacey and Mohammed Bakhtiar 
 - London :  Hodder & Stoughton,  1980 
 - 364 p. :  ill. ;  22 cm. 
<br/><br/><label>ISBN: </label>0340225238 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cephalosporins<br/>Penicillins<br/>Antibiotics