Technology

(VARIOUS AUTHORS).

New York, American Telephone and Telegraph Company, 1979.

WEYGAND, HERRMANN.

Laipzig, Buchhandlung für Militairwissenschaften, 1872.

OXHOLM, PETER LOTHARIUS.

Kiøbenhavn, Nicolaus Møller, 1777.

THORSTENSEN, SV.

Oslo, 1946.

BERGSØE, PAUL.

Copenhagen, 1938.

DOWSETT, H.M.

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

SMILES, SAMUEL.

London, John Murray, 1857.

MÜLLER, HEINRICH.

Berlin, Polytechnische Buchhandlung 1875.

TELEPHONY -

Chicago, 1906-14.

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.

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.