O'Sullivan, Robert Brett.  1923- <br/><br/>
The base of the Upper Jurassic Morrison Formation in east-central Utah :  a review of the first description of the base of the Morrison Formation in east-central Utah and some later modifications / 
by Robert B. O'Sullivan 
 - Washington, D.C. :  U.S. Government Printing Office,  1984 
 - 17 p. :  ill. ;  24 cm. 
 - Geological Survey bulletin ;  1561 .
<br/><br/>Bibliography : p. 16-17 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Utah<br/>Morrison Formation
<br/><br/><label>Dewey Class. No.: </label>551.766