Glassberg, Jeffrey <br/><br/>
Butterflies through binoculars :  a filed guide to butterflies in the Boston-New York-Washington region / 
Jeffrey Glassberg 
 - New York :  Oxford University Press,  1993 
 - 160 p. ;  22 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0195079825 
<br/><br/><label>LCCN: </label>92-033087 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Butterflies--Northeastern States<br/>Butterflies--Identification--Northeastern States<br/>Butterfly watching--Northeastern States