Author
Rand McNally and Company
Pennsylvania Railroad Investigating Committee
3
Encyclopaedia Britannica, Inc
2
Gulf Oil Corporation
1
Higginbotham, Don
1
Hudson, Donald George, 1897-
1
Hudson, George Donald, 1897-
1
Istituto geografico De Agostini
1
Jackson, Joseph, 1867-1946
1
Nebenzahl, Kenneth, 1927-
1
Philadelphia Transportation Company
1
Texaco, Inc
1
Texas Company, Inc
1
United States Virgin Islands. Department of Tourism
1
Yust, Walter, b. 1894
1