Wegemann, Carroll H. <br/><br/>
Wasatch fossils in so-called fort union beds of the powder river basin, Wyoming ans their bearing on the stratigraphy of the region. 

 - Washington  Government Printing Office  1917 
 - pp. 57-60 
<br/><br/> Impreso 
<br/><br/><br/>Ingles 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERIA