Ash, Sidney R.,  1928- <br/><br/>
North American species of Tempskya and their stratigraphic significance / 
by Sidney R. Ash and Charles B. Read, with a section on stratigraphy and age of the Tempskya-bearing rocks of southern Hidalgo County, New Mexico, by Robert A. Zeller 
 - Washington :  U.S. Govt. Print. Off.,  1976 
 - iii, 42 p., 13 leaves of plates :  ill. ;  29 cm. 
 - Geological Survey professional paper ;  874 .
<br/><br/> Includes index 
<br/><br/>Bibliography: p. 36-40 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Tempskya<br/>Paleobotany--Cretaceous<br/>Paleobotany--New Mexico--Hidalgo County<br/>Paleobotany--North America<br/>Geology, Stratigraphic--Cretaceous
<br/><br/><label>Dewey Class. No.: </label>561.73