by John S. Pomeroy
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Map showing late 1977 debris avalanches ...
Landslides in the Greater Pittsburgh reg...
Slope stability in the Marietta area, Wa...
Map showing physical characteristics of ...
Preliminary bedrock geologic map of the ...
Geologic relationships of slope movement...
Cornplanter
Along The Allegheny River
The Little Water Medicine Society of the...
Michael Van Valkenburgh Associates
Tales from our towns
Journal of Samuel Maclay while surveying...