Snakes of the Agkistrodon complex a monographic review : issued to commemorate the I World Congress of Herpetology, Canterbury 1989 / 
Howard K. Gloyd and Roger Conant. 
 -- [Estados Unidos?] :   Society for the Study of Amphibians and Reptiles,   1990 
 - VI, 614p., 52 h. de lám. 
<br/><br/>ISBN 0-916984-20-6 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Reptiles
<br/><br/><label>Universal Decimal Class. No.: </label>598.1