Gaskell, Walter Holbrook,  1847-1914 <br/><br/>
The origin of vertebrates / 
by Walter Holbrook Gaskell 
 - London :  Longman,  1908 
 - ix, 537 p. :  ill. ;  23 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Vertebrates