Hobbs, S. W. (Samuel Warren),  1911. <br/><br/>
Ordovician and older rocks of the Bayhorse Area, Custer County, Idaho / 
by S. W. Hobbs and W. H. Hays. 
 - Denver :  U. S. Geological Survey,  1990. 
 - 40 p. ;  28 cm. 
<br/><br/> detailed descriptions and columnar sections of the major stratigraphic ... 
<br/><br/><label>LCCN: </label>89-600226 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology, stratigraphic--Ordovician.<br/>Geology--Idaho--Custer County.