Bergström, Stig M. <br/><br/>
Conodonts from the Lexington limestone (Middle Ordovician) of Kentucky and its lateral equivalents in Ohio and Indiana, 
by Stig M. Bergström and Walter C. Sweet. 
 - Ithaca, N.Y.,  Paelontological Research Institution,  1966. 
 - 272-441 p.  illus., map.  23 cm. 
 - Bulletins of American paleontology  v. 50, no. 229 .
<br/><br/>Bibliography: p. 407-411. 
<br/><br/><label>LCCN: </label>gs 66000135  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Conodonts.<br/>Paleontology--Ordovician.<br/>Paleontology--Kentucky.
<br/><br/><label>LC Class. No.: </label>QE899  / .B4 
<br/><br/><label>Dewey Class. No.: </label>560.172