- Officina Petri Schenkii (Amsterdam) (1)
- Oficina de Longitudes (Bogotä) (1)
- Ohio State Commissioners of Public Printing (Columbus) (1)
- Oklahoma Geological Survey (Norman, Oklahoma?) (1)
- Oliver & Boyd (Edinburgh) (1)
- Oliver Iron Mining Co., Mining Engineering Dept. ; Duluth, Minnesota (1)
- On sale at U.S. Lake Survey Office (Detroit, Mich) (1)
- On sale at U.S. Lake Survey Office (Detroit, Michigan) (1)
- Ordered by the House of Commons to be printed ; London (1)
- Ordnance Survey (Dublin) (1)
- Ordnance Survey (England) (1)
- Ordnance Survey (London) (2)
- Ordnance Survey Office (Richmond upon Thames, London?) (1)
- Ordnance Survey Office (Southampton) (5)
- Oregon State Highway Commission (Salem, Or) (2)
- Oxford University Press (London) (1)
