Author
Philadelphia Record
5
Philadelphia (Pa.) Bureau of Surveys
2
Philadelphia Councils Committee on Public Highways
2
Aldridge, Fred C. Jr
1
American Society of Civil Engineers. Philadelphia Section
1
Boggs, Benj. R. (Benjamin Randolph)
1
Double, Bill
1
Duffy, John
1
Engineers Club of Philadelphia
1
Firth, Frank J.
1
Independence National Historic Park
1
Interstate Commission on the Delaware River Basin Conference
1
Neeson, John Henry
1
Philadelphia (Pa.) Committee on House Drainage, Ventilation, etc
1
Philadelphia (Pa.). Board of Health
1
Preston Drainage Company
1
Turner, Ellwood Jackson, 1886-
1
Vaughan, H. B. 1888-
1
Wagner, Samuel Tobias
1
Waring, George E., Jr. 1833-1898
1
Webster, George S.
1
Wolman, Abel, 1892-
1