Gannett, Samuel S.  1861-1939. <br/><br/>
Results of spirit leveling in Pennsylvania for the years 1899 to 1905 inclusive / 
by S. S. Gannett and D. H. Baldwin. 
 - Washington,  Govt. Print. Off.,  1906. 
 - 62, ii p. ;  24 cm. 
 - U.S. Geological survey. Bulletin  no. 288 .
 - Geological Survey (U.S.).  Bulletin ;  no. 288. .
<br/><br/> Subject series: F, Geography, 50.  Issued also as House doc. no. 836, 59th Cong., 1st sess.  Includes index. 
<br/><br/><label>LCCN: </label>gs 06000719  
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Pennsylvania--Altitudes.
<br/><br/><label>LC Class. No.: </label>QE75  / .B9 no. 288