Tanai, Toshimasa <br/><br/>
Revisions of Ulmus and Zelkova in the Middle and Late Tertiary of western North America / 
by Toshimasa Tanai and Jack A. Wolfe 
 - Washington,D.C. :  United States Government Printing Office,  1977 
 - iii, 14 p., 4 leaves of plates :  ill. ;  29 cm. 
 - Geological Survey professional paper ;  1026 .
<br/><br/> Includes index 
<br/><br/>Bibliography: p. 10-11 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Elm, Fossil<br/>Zelkova, Fossil<br/>Paleobotany--Tertiary<br/>Paleobotany--North America
<br/><br/><label>Dewey Class. No.: </label>561.3