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Pennsylvania Caves (Topographic and Geologic Survey Bulletin G3)
Pennsylvania Caves (Topographic and Geologic Survey Bulletin G3)
Pennsylvania Caves (Topographic and Geologic Survey Bulletin G3)
Pennsylvania Caves (Topographic and Geologic Survey Bulletin G3)
Pennsylvania Caves (Topographic and Geologic Survey Bulletin G3)
Pennsylvania Caves (Topographic and Geologic Survey Bulletin G3)
Stone, Ralph W.

Pennsylvania Caves (Topographic and Geologic Survey Bulletin G3)


Harrisburg, PA: Commonwealth of Pennsylvania Department of Internal Affairs, Topographic and Geologic Survey, 1930.

Softcover 8vo, 63pp. Outer wraps with dirt/soil, lightly bumped at the corners. Contents bright and clean. Great photographs.