1920 in science

Astronomy and space science

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Medicine

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References

  1. "Robert H. Goddard Story". astronauticsnow. Retrieved 2019-07-19.
  2. Michelson, Albert Abraham; Pease, Francis G. (1921). "Measurement of the diameter of alpha Orionis with the interferometer". Astrophysical Journal (PDF). 53 (5): 249–59. Bibcode:1921ApJ....53..249M. doi:10.1086/142603.
  3. Based on its genetic history. "HIV pandemic's origins located". University of Oxford. 2014-10-03. Retrieved 2014-10-05.
  4. Mannich, C.; Löwenheim, Helene (1920). "Ueber zwei neue Reduktionsprodukte des Kodeins". Archiv der Pharmazie. 258 (2–4): 295–316. doi:10.1002/ardp.19202580218.
  5. Théorie mathématique des phénomènes thermiques produits par la radiation solaire (Paris).
  6. Griffith, A. A. (February 1920). "The Phenomenon of Rupture and Flow in Solids". Philosophical Transactions of the Royal Society. A221 (582–593): 163–98. Bibcode:1921RSPTA.221..163G. doi:10.1098/rsta.1921.0006. hdl:2027/uiug.30112007702761. JSTOR 91192.
  7. "What happened on July 25". Dates in History. Retrieved 2012-01-09.
  8. Glinsky, Albert (2000). Theremin: Ether Music and Espionage. Urbana: University of Illinois Press. p. 26. ISBN 0-252-02582-2. Retrieved 2012-01-09.
  9. Asimov, Isaac (September 1979). "The Vocabulary of Science Fiction". Asimov's Science Fiction.
  10. Zunt, Dominik (2004). "Who did actually invent the word "robot" and what does it mean?". Karel Čapek (1890-1938). Archived from the original on 2012-02-04. Retrieved 2011-12-06.
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