Marshall, R. B.  1867-1949 <br/><br/>
Results of spirit leveling in Alabama, 1911. 
R. B. Marsahll, chief geographer. 
 - Washington,  U.S. Govt. Print. Off.,  1912. 
 - 38 p.  pl.  24 cm. 
 - U.S. Geological survey. Bulletin 517 .
 - United States.  Geological Survey.  Bulletin ;  517. .
<br/><br/> Work done in cooperation with State of Alabama through the Geological Survey of Alabama, Eugene A. Smith, State geologist. 
<br/><br/><label>LCCN: </label>gs 12000540  
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Alabama--Altitudes.
<br/><br/><label>LC Class. No.: </label>GB495.A2  / A3