PDF: American Bell Telephone Annual Report, 1890

PDF: American Bell Telephone Annual Report, 1891

PDF: American Bell Telephone Annual Report, 1892

PDF: Ericsson 1892 catalog

PDF: American Bell Telephone Annual Report, 1893

PDF: TW Ness 1893 Catalog

PDF: American Bell Telephone Annual Report, 1894

PDF: Western Telephone 1894 Catalog

PDF: American Bell Telephone Annual Report, 1895

PDF: DeVeau c.1895 Catalog

PDF: American Bell Telephone Annual Report, 1896

PDF: American Bell Telephone Annual Report, 1897

PDF: Ericsson 1897 catalog

PDF: Keystone Telephone 1897 Catalog

PDF: American Bell Telephone Annual Report, 1898

PDF: Western Telephone 1898 Catalog

PDF: American Bell Telephone Annual Report, 1899

PDF: Chicago Telephone Supply c 1899 Catalog

PDF: Mianus Electric Co. 1899 catalog