Tappan, Helen Nina,  1917- <br/><br/>
The paleobiology of plant protists / 
Helen Tappan. 
 - San Francisco :  W. H. Freeman,  1980. 
 - xxi, 1028 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographies and index. 
<br/><br/><label>ISBN: </label>0716711095 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Micropaleontology.<br/>Paleobotany.<br/>Unicellular organisms.