Baum, Rex L <br/><br/>
Kinematics of the Aspen Grove landslide, Ephraim Canyon, central Utah :  description and analysis of deformational structures and of spatial and temporal patterns of movement of the landslide / 
Rex L. Baum, Robert W. Fleming and Arvid M. Johnson 
 - Washington :  U.S. Government Printing Office,  1993 
 - 34 p. :  ill. ;  28 cm. 
 - U.S. geological survey bulletin ;  1842 .