Heliotrope (instrument) (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Heliotrope (instrument)" in English language version.

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archive.org

Dodd, A.; Smith, A. (1822). "The Heliotrope, a New Instrument". Arts and Sciences. The Gentleman's Magazine. 92, Part 2: 358.
Gleanings in science, Volume 3. Baptist Mission Press. 1831. p. 344.
Abbe, Cleveland (December 1900). "Meteorology and Geodesy". Monthly Weather Review. XXVIII (12): 545–547. doi:10.1175/1520-0493(1900)28[545:mag]2.0.co;2. Retrieved 10 July 2013.

Abbe, Cleveland (December 1900). "Meteorology and Geodesy". Monthly Weather Review. XXVIII (12): 545–547. doi:10.1175/1520-0493(1900)28[545:mag]2.0.co;2. Retrieved 10 July 2013.

Dunnington, G. Waldo (1955). Carl Friedrich Gauss: Titan of Science. New York: Exposition Press. pp. 122–127, 119, 221. ISBN 0-88385-547-X.