TY  - BOOK
AU  - Leighton,Henry
TI  - Guidebook to the geology about Pittsburgh,
T2  - Bulletin G,
AV  - QE158.P55 L42
PY  - 1939///
CY  - Harrisburg, Pa.
PB  - Department of internal affairs, Topographic and geologic survey
KW  - Geology
KW  - Pennsylvania
KW  - Pittsburgh Region
KW  - Pittsburgh (Pa.)
KW  - Guidebooks
N1  - At head of title: Pennsylvania Geological survey, Fourth series; On cover: Commonwealth of Pennsylvania. Department of internal affairs; "Selected bibliography": p. 34-35
ER  -