1
Author: Ebright, John R.
Published 1952
Record Source: Published Materials
Subjects and Genres: '; ...Geology Pennsylvania....
Book
2
Author: Delano, Helen L.
Published 1991
Record Source: Published Materials
Subjects and Genres: '; ...Geology Pennsylvania....
Book
3
Author: Willard, Bradford, 1894-
Published 1958
Record Source: Published Materials
Subjects and Genres: '; ...Geology Pennsylvania....
Book
4
Author: Wagner, Walter Richard, 1928-
Published 1958
Record Source: Published Materials
Subjects and Genres: '; ...Geology Pennsylvania....
Book
5
Author: Willard, Bradford, b. 1894.
Published 1962
Record Source: Published Materials
Subjects and Genres: '; ...Geology Pennsylvania....
Book
6
Published 1962
Record Source: Published Materials
Subjects and Genres: '; ...Geology Pennsylvania....
Serial
7
Published 1999
Record Source: Published Materials
Subjects and Genres: '; ...Geology Pennsylvania....
Book
8
9
Author: Stone, Ralph W. 1876-1964.
Published 1931
Record Source: Published Materials
Subjects and Genres: '; ...Geology Pennsylvania....
Book
10
Published 1891
Record Source: Published Materials
Subjects and Genres: '; ...Geology Pennsylvania Maps....
Map
11
Author: Geyer, Alan R.
Published 1979
Record Source: Published Materials
Subjects and Genres: '; ...Geology Pennsylvania Guidebooks....
Book
12
Author: Troost, Gerard, 1776-1850.
Published 1826
Record Source: Published Materials
Subjects and Genres: '; ...Geology Pennsylvania Philadelphia....
Book
13
Record Source: Published Materials
Subjects and Genres: '; ...Geology Pennsylvania Periodicals....
Journal
14
Published 1958
Record Source: Published Materials
Subjects and Genres: '; ...Geology Pennsylvania Maps....
Book
15
Author: Ashley, George Hall, 1866-1951.
Published 1931
Record Source: Published Materials
Subjects and Genres: '; ...Geology Pennsylvania....
Book
16
Author: Gray, Carlyle.
Published 1958
Record Source: Published Materials
Subjects and Genres: '; ...Geology Pennsylvania Richland quadrangle....
Book
17
Author: Geyer, Alan R.
Published 1958
Record Source: Published Materials
Subjects and Genres: '; ...Geology Pennsylvania Lebanon quadrangle....
Book
18
Subjects and Genres: '; ...Geology Pennsylvania York County....
Book
19
Author: Lohman, Stanley William, 1907-
Published 1937
Record Source: Published Materials
Subjects and Genres: '; ...Geology Pennsylvania....
Book
20
Published 1858
Record Source: Published Materials
Subjects and Genres: '; ...Geology Pennsylvania....
Book