Heintzelman, Donald S. <br/><br/>
The birdwatcher's activity book / 
Donald S. Heintzelman 
 - Harrisburg, PA :  Stackpole Books,  1983 
 - 250 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographies and index 
<br/><br/><label>LCCN: </label>82-019201 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Bird watching