Technology

TELEGRAPHY - SIGNALLING - BERGSTRÄSSER, J.A.B.

Leipzig, Breitkopf, 1795.

ASMUS & LORENZ.

Berlin, o. Jahr (um 1910).

GRAY, FRANK & J. W. HORTON & R. C. MATHES.

New York, American Telephone and Telegraph Company, 1927.

MEALY, GEORGE H.

New York, American Telephone and Telegraph Company, 1955.

CARSON, JOHN R.

New York, American Telephone and Telegraph Company, 1928.

US ARMY AND AIR FORCE (EDT.).

Washington, United Stats Government printing Office, 1953.

ABDANK-ABAKANOWICZ, BR. [BRUNO].

Paris, Gauthier-Villars, 1886.

RICE, S. O.

New York, American Telephone and Telegraph Company, 1948.

STUART, CHARLES B.

New York, Charles B. Norton, 1852.

VOIT, (J.M.).

Augsburg und Leipzig, 1826-27.

LÜDER, CHRISTIAN FRIEDRICH von.

Frankfurt am Mayn, Johann Gottlieb Garbe, 1779.

SPON, E. & F.N.

London, E. & F.N. Spon, 1869-74.

FRIIS, F.R.

Kbhvn., 1867.

SARTORI, AUGUST.

Berlin, Mittler und Sohn, 1894.

HERO (HERON) OF ALEXANDRIA.

Urbino, Bartholomeo, e Simone Ragusij fratelli, 1592.

BERG, CARL HEINRICH EDMUND von.

Darmstadt, Leske, 1830.

WILLIAMS, W.J.

Portsea, Woodward, 1843.

MIETH, MICHAEL (+) CHRISTOPH FRIEDRICHS von GEISSLER.

Dresden und Leipzig, Hilschern, 1736. + Dresden, Zimmermann, 1718.