ERNST, Carl H. <br/><br/>
Turtles of the United States and Canada / 
Carl H. Ernst and Jeffrey E. Lovich. 
 - 2nd. ed. -- 
 -- Baltimore :   The Johns Hopkins University Press,   cop. 2009 
 - xii, 827 p.  il. 
<br/><br/>ISBN 978-0-8018-9121-2 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Quelonios - Canadá<br/>Tortugas<br/>Tortugas - Estados Unidos
<br/><br/><label>Universal Decimal Class. No.: </label>598.13(73+71)