Technology

SALOMON, FR.J.

K., 1849.

DAVIES, QWEN L. (EDT.).

London, Oliver and Boyd, 1957.

PREECE, WILLIAM HENRY & ARTHUR J. STUBBS.

London, Whittaker & Co., 1893.

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

Leipzig, Breitkopf, 1795.

KRIEGER, A.

Kbhvn. 1936.

(STETTNER, DANIEL).

Frankfurth und Leipzig, 1755.

ASMUS & LORENZ.

Berlin, o. Jahr (um 1910).

MEYER, KARL.

Kbhvn., 1918.

HOUSTON, ALEXANDER CRUIKSHANK.

London, 1918.

KAUFMANN, WALTER.

Oldenburg, 1962.

PHYSIKALISCHEN WERKSTÄTTEN A.=G. GÖTTINGEN.

Göttingen, n.d. ca. 1910.

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.

US ARMY AND AIR FORCE (EDT.).

Washington, United Stats Government printing Office, 1953.

CARSON, JOHN R.

New York, American Telephone and Telegraph Company, 1928.

RICE, S. O.

New York, American Telephone and Telegraph Company, 1948.

STUART, CHARLES B.

New York, Charles B. Norton, 1852.