Technology

SMILES, SAMUEL.

London, John Murray, 1857.

THORSTENSEN, SV.

Oslo, 1946.

KARMARSCH, KARL.

Hannover u. Wien, helwingschen Hof=Buchhandlung, 1837-41.

(VARIOUS AUTHORS).

New York, American Telephone and Telegraph Company, 1979.

TELEPHONY -

Chicago, 1906-14.

MEINERT, F. (FRIEDRICH).

Berlin, Maurerschen Buchhandlung, 1819.

BECKER, MAX.

Stuttgart, Carl Mäcken, 1853.

HAARMANN, F.L.

Holzminden, Schulbuchhandlung in Braunschweig, 1862.

(SAHLBOM, W.).

Stockholm, N. Marcus, 1859.

BREYMANN, G.A.

Stuttgart, Gustav Weise, 1868-81.

BREYMANN, G.A.

Stuttgart, Hoffmann'sche Verlags-Buchhandlung, 1860.

BREYMANN, G.A.

Stuttgart, Gustav Weise, 1865.

BREYMANN, G.A.

Stuttgart, Hoffmann'sche Verlags-Buchhandlung, 1863.

BECKER, MAX.

Stuttgart, Carl Mäcken, 1855.

SIEMENS, C. W.

Newcastle-Upon-Tyne, M. & M. W. Lambert, 1877.

MORRISON, L. W.

New York, American Telephone and Telegraph Company, 1947.

PETERSON, E.

New York, American Telephone and Telegraph Company, 1946.

SYDOW, ALBRECHT von.

Berlin, Amelang, 1838.