Marshall, R. B.  1867-1949. <br/><br/>
Results of spirit leveling in Oregon, 1896 to 1913, inclusive, 
R. B. Marshall, chief geographer; work done in cooperation with the state from 1905 to 1913, inclusive, John H. Lewis, state engineer. 
 - Washington,  Govt. Print. Off.,  1914. 
 - 175 p.  pl.  24 cm. 
 - U. S. Geological Survey. Bulletin  556 .
<br/><br/><label>LCCN: </label>gs 14000473  
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Oregon--Altitudes.
<br/><br/><label>LC Class. No.: </label>QE75  / .B9 no. 556