Halfpenny, James C.        <br/><br/>
A field guide to mammal tracking in western America 
James C. Halfpenny 
 - Boulder, Colorado  Johnson Books  1986 
 - 161 p 
<br/><br/><label>ISBN: </label>0-933472-98-6 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Tracking and Trailing--West (U.S.)<br/>Animal Tracks--West (U.S.)