The Diatom genus Actinocyclus in the western United States 
J. Platt Bradbury and William N. Krebs, editors. 
 - Washington  U.S. GPO  1993. 
 - 73 p. 
 - U.S. Geological Survey professional paper  1543 .
<br/><br/>Includes bibliographical references. 
<br/><br/>A. Actinocyclus species from lacustrine Miocene deposits of the western United States / by J. Platt Bradbury and William N. Krebs -- B. Geologic ranges of lacustrine Actinocyclus species, western United States / by William N. Krebs and J. Platt Bradbry. 
<br/><br/><label>LCCN: </label>93035637  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Actinocyclus, Fossil--West (U.S.)<br/>Paleobotany--West (U.S.)<br/>Paleobotany--Miocene.
<br/><br/><label>LC Class. No.: </label>QE955  / .D53 1993 
<br/><br/><label>Dewey Class. No.: </label>561/.93 
<br/><br/><label>Gov. Doc. Class. No.: </label>I19.16:P1543A&B