Marshall, R. B.  1867-1949. <br/><br/>
Results of spirit leveling in Kentucky, 1898 to 1913, inclusive / 
R.B. Marshall, chief geographer. 
 - Washington,  Govt. Print. Off.,  1914. 
 - 184 p. :  pl. ;  24 cm. 
 - U.S. Geological survey. Bulletin 554 .
 - United States.  Geological Survey.  Bulletin ;  554. .
<br/><br/> "Work from 1902 to 1913, inclusive, done in cooperation with the Kentucky Geological Survey." d  Includes index. 
<br/><br/><label>LCCN: </label>gs 14000231  
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Kentucky--Altitudes.
<br/><br/><label>LC Class. No.: </label>QE75  / .B9 no. 554