Dillard, Gary E. <br/><br/>
Common freshwater algae of the United States :  an illustrated key to the genera (excluding the diatoms) ... / 
Gary E. Dillard. 
 - Berlin :  Gebr. Borntraeger,  1999. 
 - 173 p. :  ill. ;  22 cm. 
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>3443500269 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Freshwater algae--United States--Identification.<br/>Freshwater algae--Classification.--United States