... Allentown quadrangle
Subtitle: mineral resources, by Benjamin LeRoy Miller
By: Published in cooperation with the U.S. Geological survey
Series: Atlas (Pennsylvania. Bureau of Topographic and Geologic Survey) -- no. 206.
Published: 1925
Place of publication: Harrisburg]
Language: eng
Number of pages: 196
Copyright date: 1925
Subjects: Geology; Mines and mineral resources
Notes: At head of title: Pennsylvania geologic survey, fourth series ...

Pennsylvania Geological Survey, fourth series. "Pennsylvania Geological Survey, fourth series."