Thomas, David, 1776-1859. <br/><br/>
Travels through the western country in the summer of 1816 
/ Introd. by John W. Wells. Foreword by George W. White. Notes on Thomas's geological observations by John W. Wells and George W. White 
 - Darien, Conn  Hafner Publishing Company  1970 
 - xiv, 338 p. : maps (3 fold. in pocket) ; 25 cm. 
 - Contributions to the history of geology ; v.6 .
<br/><br/> Facsim. reprint of the 1819 ed. 
<br/><br/>Bibliography: p. 335-338. 
<br/><br/><label>LCCN: </label>72-130509 //r902 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Indiana--Description and travel<br/>United States--Description and travel--1783--1848<br/>Ohio River Valley--Description and travel