Leighton, Henry,  1884- <br/><br/>
Guidebook to the geology about Pittsburgh, 
by Henry Leighton. 
 - Harrisburg, Pa.,  Department of internal affairs, Topographic and geologic survey,  1939. 
 - 35 p.  illus., map, tables.  23 cm. 
 - Bulletin G,  17 .
<br/><br/> At head of title: Pennsylvania Geological survey, Fourth series.  On cover: Commonwealth of Pennsylvania. Department of internal affairs. 
<br/><br/>"Selected bibliography": p. 34-35. 
<br/><br/><label>LCCN: </label>gs 39000361  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Pennsylvania--Pittsburgh Region.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Pittsburgh (Pa.)--Guidebooks.
<br/><br/><label>LC Class. No.: </label>QE158.P55  / L42