1
Record Source: Published Materials
Subjects and Genres: '; ...Philadelphia (Pa.). Dept. of City Transit....
Serial
2
Published 1886
Record Source: Published Materials
Subjects and Genres: '; ...Metropolitan Rail Road Company (Philadelphia, Pa.)...
Book
3
Published 1955
Record Source: Published Materials
...Technical memorandum (Philadelphia (Pa.). Urban Traffic and Transportation Board) ;...
Book
4
5
Published 1908
Record Source: Published Materials
Book
8
9
Published 1910
Record Source: Published Materials
Book
10
Published 1960
Record Source: Published Materials
Book
11
Published 1908
Record Source: Published Materials
Book
12
Author: Esler, Frederic B.
Published 1888
Record Source: Published Materials
Book
13
Record Source: Published Materials
Journal
14
Published 1919
Record Source: Published Materials
Book
17
18