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- Personer och institutioner: Cassel, Petter & Galpin
- Location:
- England, Frankrike, Storbritannien, USA
- Time:
- 1848-1858 [Cassell plc.], 1858-1878 [Cassell, Petter & Galpin], 1878-1883 [Cassell, Petter, Galpin & Company], 1883-1998 [Cassell and Company, Ltd], 1998- [taken over by Orion Publishing Group]