Subject
- Niagara Falls (N.Y. and Ont.)--Description and travel.1
- Palais royal de Bruxelles (Brussels, Belgium)1
- Pan American Airways Corporation.1
- Pan American World Airways, Inc.1
- Passenger trains.1
- Petar II Karađorđević, King of Yugoslavia, 1923-1970.1
- Political campaigns.1
- Presidential candidates--United States.1
- Railroad accident report.1
- Railroad accidents--France.1
- Railroad accidents.1
- Railroad stations--France.1
- Railroad tracks--Maintenance and repair.1
- Religion and culture--Serbia and Montenegro.1
- Rhine River.1
- Rocky Mountains--Description and travel.1
- Roosevelt, Elliott, 1910-1990.1
- Roosevelt, John A. (John Aspinwall), 1916-1981.1
- Seaplanes.1
- Sikorsky Aviation Corporation.1