Smith, Gilbert M <br/><br/>
Fresh water algae of the united states 

 - 2 
 -  McGraw-Hill book Co, Inc, New York  1950 
 - 719 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Specific types of Algae
<br/><br/><label>Dewey Class. No.: </label>PG 589.4  SMI-F2