Rugh, Roberts,  1903- <br/><br/>
The Frog :  its reproduction and developmemnt / 
by Roberts Rugh 
 - New York :  McGraw-Hill Book,  1951 
 - x, 336 p. :  ill. ;  24 cm. 
<br/><br/>Bibliography: p. 311-320 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Frogs<br/>Embryology--Amphibians