Technology

ELLIS, WILLIAM.

London, Weaver Bickerton, 1732.

ADAMS, GEORGE.

Leipzig, Crusius, 1798 & 1799.

(VARIOUS AUTHORS).

New York, American Telephone and Telegraph Company, 1979.

TELEPHONY -

Chicago, 1906-14.

THORSTENSEN, SV.

Oslo, 1946.

BERGSØE, PAUL.

Copenhagen, 1938.

SMILES, SAMUEL.

London, John Murray, 1857.

SIDENBLADH, ELIS.

Sth., 1947.

SVENSKA JÄRNVÄGER.

Stockholm., 1868-(72).

MÜLLER, HEINRICH.

Berlin, Polytechnische Buchhandlung 1875.

DOWSETT, H.M.

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

WEYGAND, HERRMANN.

Laipzig, Buchhandlung für Militairwissenschaften, 1872.

OXHOLM, PETER LOTHARIUS.

Kiøbenhavn, Nicolaus Møller, 1777.

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.