Pennypack, Philadelphia's backdoor wilderness
By: text and photographs by Calvin J. Klein ; sketches by Barbara A. Klein.
Edition: 1st ed.
Publisher: Tri-County Printers
Published: 1983
Place of publication: Oreland, PA (P.O. Box 180, Oreland 19075)
Language: eng
Number of pages: 73
Subjects: Natural history -- Pennsylvania -- Pennypack Creek Watershed.; Natural areas -- Pennsylvania -- Pennypack Creek Watershed.