1
Record Source: Published Materials
Subjects and Genres: '; ...Locks (Hydraulic engineering)...
Book
2
Record Source: Published Materials
Subjects and Genres: '; ...Locks (Hydraulic engineering)...
Book
3
Published 1840
Record Source: Published Materials
Subjects and Genres: '; ...Locks (Hydraulic engineering) Pennsylvania....
Book
4
Record Source: Published Materials
Subjects and Genres: '; ...Locks (Hydraulic Engineering)...
Philadelphia Record Photograph Morgue (Name Index)
5
Published 1990
Record Source: Published Materials
Subjects and Genres: '; ...Locks (Hydraulic engineering) Pennsylvania Freemansburg....
Book
7
Author: Roberts, W. Milnor 1810-1881.
Published 1857
Record Source: Published Materials
Subjects and Genres: '; ...Locks (Hydraulic engineering) Ohio River....
Book
8
Author: Wright, Benjamin, 1770-1842.
Published 1824
Record Source: Published Materials
Subjects and Genres: '; ...Locks (Hydraulic engineering)...
Book
9
Author: McKelvey, William J.
Published 1978
Record Source: Published Materials
Subjects and Genres: '; ...Locks (Hydraulic engineering) Middle Atlantic States History....
Book