Technology

TELEPHONY -

Chicago, 1906-14.

SIDENBLADH, ELIS.

Sth., 1947.

THORSTENSEN, SV.

Oslo, 1946.

DOWSETT, H.M.

London, The Gresham Publ. Comp., 1923-24.

SMILES, SAMUEL.

London, John Murray, 1857.

BERGSØE, PAUL.

Copenhagen, 1938.

MORRISON, L. W.

New York, American Telephone and Telegraph Company, 1947.

PETERSON, E.

New York, American Telephone and Telegraph Company, 1946.

SIEMENS, C. W.

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

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.