Johnels Alf G., <br/><br/>
On the development and morphology of the skeleton of the head of petromyzon / 
Alf G. Johnels. 
 - 141 páginas :  il. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>CRANEO--MORFOLOGIA.<br/>LAMPREA.<br/>PETROMYZONIFORMES.
<br/><br/><label>Dewey Class. No.: </label>FOLLETOS