Errington, Paul L.  x <br/><br/>
Muskrat populatins  x 

 - x 
 - x  A contribution of the Iowa State Univ.Press  1963 
 - x, 665 
<br/><br/>x 
<br/><br/><label>ISBN: </label>x 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Zoology Zoology 
<br/><br/><label>Dewey Class. No.: </label>591/ERM