PDF: Andrae c1910 Catalog
PDF: AT&T Annual Report, 1910
PDF: BTMC 1910 catalog
PDF: Ericsson 1910 catalog
PDF: AT&T Annual Report, 1911
PDF: Ericsson 1911 catalog
PDF: AT&T Annual Report, 1912
PDF: Chicago Telephone c1912 Catalog
PDF: Gray Pay Station 1912 Catalog
PDF: Kellogg 1912 Catalog
PDF: Pacific Telephone Exchange Plant Inventory, Volume XIII
PDF: Pacific Telephone Exchange Plant Inventory, Volume XIV
PDF: Pacific Telephone Exchange Plant Inventory, Volume XV
PDF: Siemens and Halske 1912 catalog
PDF: Western Electric 1912 Bulletin
PDF: AT&T Annual Report, 1913
PDF: Ericsson 1913 switchboards catalog
PDF: Ericsson 1913 switchboards catalog (abridged)
PDF: AT&T Annual Report, 1914
PDF: Ericsson 1914 accessories catalog
PDF: Farr 1914 Catalog
PDF: NE 1914 catalog
PDF: Stromberg 1914 Switchboards catalog
PDF: Andrae c1915 Giant Telephones
PDF: AT&T Annual Report, 1915
PDF: Connecticut Telephone 1915 Intercoms catalog
PDF: Farr 1915 Catalog
PDF: How Bell Invented The Telephone (Watson Speech)
PDF: Kellogg 1915 Switchboards catalog
PDF: Kellogg 1915 Switchboards catalog
PDF: North 1915 Magneto Telephones Bulletin
PDF: AT&T Annual Report, 1916
PDF: Kellogg 1916 Catalog
PDF: Kellogg 1916 PBX Switchboards catalog
PDF: Kellogg Telephone Facts 1916
PDF: WE 1916 Catalog
PDF: WE 1916 Magneto Phones Catalog
PDF: AT&T Annual Report, 1917
PDF: Kellogg 1917 wood phone catalog
PDF: Monarch 1917 catalog
PDF: AT&T Annual Report, 1918
PDF: Kellogg 1918 Intercoms Catalog
PDF: AT&T Annual Report, 1919