Weir, Gordon W.  1922-2011 <br/><br/>
Calloway creek limestone and Ashlock and Drakes formations (Upper Ordovician) in South-Central Kentucky / 
by Gordon W. Weir, Robert C. Greene and George C. Simmons. 
 -- Washington :   United States Government Printing Office,   1965 
 - 36 p. -- 
 (Geological Survey Bulletin  ;  1224-D).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Estratigrafía<br/>Kentucky<br/>Ordovícico
<br/><br/><label>Universal Decimal Class. No.: </label>551.7(769)