Technology

ADAMS, GEORGE.

Leipzig, Crusius, 1798 & 1799.

SVENSKA JÄRNVÄGER.

Stockholm., 1868-(72).

THORSTENSEN, SV.

Oslo, 1946.

SMILES, SAMUEL.

London, John Murray, 1857.

SIDENBLADH, ELIS.

Sth., 1947.

DOWSETT, H.M.

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

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.

WEYGAND, HERRMANN.

Laipzig, Buchhandlung für Militairwissenschaften, 1872.

OXHOLM, PETER LOTHARIUS.

Kiøbenhavn, Nicolaus Møller, 1777.

(VARIOUS AUTHORS).

New York, American Telephone and Telegraph Company, 1979.

BERGSØE, PAUL.

Copenhagen, 1938.

TELEPHONY -

Chicago, 1906-14.

MÜLLER, HEINRICH.

Berlin, Polytechnische Buchhandlung 1875.

MEINERT, F. (FRIEDRICH).

Berlin, Maurerschen Buchhandlung, 1819.

BECKER, MAX.

Stuttgart, Carl Mäcken, 1853.

HAARMANN, F.L.

Holzminden, Schulbuchhandlung in Braunschweig, 1862.