- Park Dept (Boston) (1)
- Park House: an AIDS Day Health Center (2000) (1)
- Park Region Map Pub. Co. (Fergus Falls, Minnesota), 1902 (1)
- Parliamentary Recruiting Committee : H. W. & V. Ltd. (1)
- Parliamentary Recruiting Committee ; Harrow, Mdx. : David Allen & Sons, Ltd. (1)
- Parliamentary Recruiting Committee] (1)
- Parvus, Jo[annes] (variant Petit, Jean) (25)
- Parvus, Joannes (variant Petit, Jean) (18)
- Pasadena Stationery & Printing Company (Pasadena, California) (1)
- Passenger Dept., Southern Pacific Co (San Francisco, Calif) (1)
- Pastor's Aid Society (St. Peter, Minn.) (1)
- Patterson publishing co. (Chicago), 1921 (1)
- Paul Lubede (1)
- Paul Maerien (1)
- Paul Parey (Berlin) (5)
- Paul R. Vogel Company (Chicago, Illinois) (3)
- Paxton's Magazine of Botany. vol 8. London: W.S. Orr & Co. (London) (1)
- Państwowy Instytut Wydawniczy (Warsaw), 1991 (1)
- Peabody Coal Co (Chicago), 1903 (1)
- Peace News (London), 1966 (1)
