Guidebook to the geology about Pittsburgh,
Leighton, Henry, 1884-
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 .
At head of title: Pennsylvania Geological survey, Fourth series. On cover: Commonwealth of Pennsylvania. Department of internal affairs.
"Selected bibliography": p. 34-35.
gs 39000361
Geology--Pennsylvania--Pittsburgh Region.
Pittsburgh (Pa.)--Guidebooks.
QE158.P55 / L42
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 .
At head of title: Pennsylvania Geological survey, Fourth series. On cover: Commonwealth of Pennsylvania. Department of internal affairs.
"Selected bibliography": p. 34-35.
gs 39000361
Geology--Pennsylvania--Pittsburgh Region.
Pittsburgh (Pa.)--Guidebooks.
QE158.P55 / L42