Recent geological history of the Delaware Valley below the Water Gap /
Ward, Freeman, 1879-
Recent geological history of the Delaware Valley below the Water Gap / by Freeman Ward. - Harrisburg, Pa. : Dept. of Internal Affairs, Topographic and Geologic Survey, 1938. - v, 76 p. : ill., maps ; 23 cm. - Bulletin G ; 10 .
Includes bibliographical references.
gs 39000031
Geology--Pennsylvania.
Geology--Delaware River Valley (N.Y.-Del. and N.J.)
QE158.D4 / W3
Recent geological history of the Delaware Valley below the Water Gap / by Freeman Ward. - Harrisburg, Pa. : Dept. of Internal Affairs, Topographic and Geologic Survey, 1938. - v, 76 p. : ill., maps ; 23 cm. - Bulletin G ; 10 .
Includes bibliographical references.
gs 39000031
Geology--Pennsylvania.
Geology--Delaware River Valley (N.Y.-Del. and N.J.)
QE158.D4 / W3