Books by B. Singer:
![[Info]](https://onlinebooks.library.upenn.edu/info.gif)
Singer, B. (Berthold), 1860-: Occupation of the Ruhr (1923) (multiple formats at archive.org)
Additional books by B. Singer in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Singer, B. (Berthold), 1860-: Copyright laws of the world, (Chicago:, 1909) (page images at HathiTrust)- Singer, B. (Berthold), 1860-: International law (T.H. Flood & co., 1918) (page images at HathiTrust)
- Singer, B. (Berthold), 1860-: Patent and trade mark laws of the world ([Hammond Press, W. B. Conkey Co.], 1911) (page images at HathiTrust)
- Singer, B. (Berthold), 1860-: Patent and trade mark laws of the world. (Chicago, 1911) (page images at HathiTrust)
- Singer, B. (Berthold), 1860-: Patents, trademarks, designs, copyrights ([G. D. Clougher & co., printers], 1907) (page images at HathiTrust)
- Singer, B. (Berthold), 1860-: Trade mark laws of the world, and unfair trade ([Hammond press, W. B. Conkey company], 1913) (page images at HathiTrust)
Find more by B. Singer at your library, or elsewhere.