Amphibians : The World of Frogs, Toads, Salamanders
and Newts
by Robert Hofrichter, Friefly Books, 2000
ISBN # 155209541X
Encyclopedia of Reptiles & Amphibians
by Harold G. Cogger, Richard G. Zweifel and DavidKirshner,
Raintree / Steck Vaughn, 1999
ISBN # 0739806858X
Amphibians in Danger : A worldwide Warning !
by Ron Frideu, Franklin Watts Inc., 1999
ISBN # 0531117375
California Zoological Supply :
http://www.calzoo.com/html/tomatofrogs.html
All About Frogs :
http://allaboutfrogs.org
Sedgwick County Zoo :
http://www.scz.org/animals/f/tomato.html