2
3
...Philadelphia Harbor....
Book
4
Record Source: Published Materials
...Philadelphia Harbors....
Book
5
Record Source: Published Materials
...Philadelphia Harbors....
Book
6
Published 1938
Record Source: Published Materials
...Philadelphia Harbor....
Book
8
Record Source: Published Materials
...Philadelphia Harbor....
Serial
9
10
Record Source: Published Materials
...Philadelphia Harbor Regulations....
Book
11
Author: Martin, Alfred S.
Published 1943
Record Source: Published Materials
...Philadelphia Harbor History....
Book
12
Record Source: Published Materials
...Pennsylvania Philadelphia Harbors Periodicals....
Journal
13
...Philadelphia Harbor Societies, etc....
Serial
14
Published 1956
Record Source: Published Materials
...Philadelphia Harbor....
Book
15
16
17
Published 1931
Record Source: Published Materials
...Philadelphia Harbor....
Book
18
Published 1909
Record Source: Published Materials
...Philadelphia Harbor....
Book
19
Record Source: Published Materials
...Philadelphia Harbors....
Book
20