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REFERENCES

  1. ZWICKY, F.: Experientia (Basel) 6, 441-445 (1950); Publ. Astr. Soc. Pacific 64, 242-246 (1952); Physics Today 6, No. 4, 7-11 (1953); Physik. Bl. 9, 406-415 (1953).
  2. HUBBLE, E. P.: The realm of the nebulae. Yale Univ. Press 1936.
  3. PEASE, F. G.: Astrophysic. J. 46, 24-55 (1917); Astrophysic. J. 51, 276-308 (1920).
  4. CURTIS, H. D.: Bull. Nat. Res. Council, Washington D. C. 2, Part 3, 171 (1921).
  5. LUNDMARK, K.: Kungl. Sv. Vetensk. akad. Handl. 60, No. 8 (1920).
  6. LUNDMARK, K.: Upsala Medd. No. 8 (1926); Upsala Medd. No. 16 = VJS 61, 254 (1926); Upsala Medd. No. 30 (1927); Upsala Medd. No. 41 = VJS 63, 350 (1928).
  7. HOLMBERG, E.: Ann. Obs. Lund No. 6 (1937).
  8. PAGE, TH.: Astrophysic. J. 116, 63-80 (1952).
  9. ZWICKY, F.: Helvet. Phys. Acta 6, 110-127 (1933); Astrophysic. J. 86, 217 (1937).
  10. EMDEN, R.: Gaskugeln. Leipzig: Teubner 1907.
  11. HUMBOLDT A. VON: Cosmos; Vol. IV, p. 28. New York: Harper and Bros 1866.
  12. WOLF, M.: Astron. Nachr. 155, 127 (1901).
  13. ZWICKY, F.: Physic. Rev. 61, 489-503 (1942).
  14. ZWICKY, F.: Helvet. Phys. Acta 26, 241-254 (1953).
  15. ZWICKY, F.: Physics Today, 6, No. 4, 7-11 (1953); Physik. Bl. 9, 406-415 (1953).
  16. ZWICKY, F.: Article to appear in the proceedings of the third Berkeley symposium on mathematical statistics and probability. Univ. of Calif. Press 1955.
  17. TOLMAN, R. C.: Relativity, thermodynamics and cosmology, p. 483. Oxford: Clarendon Press 1934.
  18. ZWICKY, F.: Astrophysic. J. 93, 411-416 (1941).
  19. ZWICKY F.: Physic. Rev. 61, 489 (1942).
  20. Carnegie Institution of Washington: Year Book No. 49, 15 (1949-1950); No. 50, 21 (1950-1951); No. 51, 24 (1951-1952); No. 52, 26 (1952-1953); No. 53, 25 (1953-1954).
  21. ZWICKY, F.: Griffith Observer 17, 134-142 (1953); Publ. Astr. Soc. Pacific, August 1955; see also P. COUDERC: L'Astronomie 68, 405-415 (1954).
  22. BAUM, W. A.: Sky a. Telescope 14, 264-267 (1955).
  23. ZWICKY, F.: Experientia (Basel) 6, 441-445 (1950); Publ. Astr. Soc. Pacific 64, 242-246 (1952).
  24. ZWICKY, F.: Proc. Nat. Acad. Sci. 15, 773-779 (1929); Physic. Rev. 34, 1623-1624 (1929).
  25. ZWICKY, F.: Astrophysic. J. 95, 555-564 (1942).
  26. SEYFERT, C. K.: Astrophysic. J. 97, 28-40 (1943).
  27. MINKOWSKI, R.: Report to th6 meeting of the astronomical society of the Pacific. Pasadena, June 21, 22, 1955.
  28. ZWICKY, F.: Helvet. Phys. Acta 27, 481-482 (1954).
  29. KEENAN, P. C.: Astrophysic. J. 81, 355-356 (1935).
  30. SCHLICHTING, H.: Grenzschichttheorie p. 326. Karlsruhe: Ed. G. Braun 1951.
  31. WILD, P.: Publ. Astr. Soc. Pacific 65, 202-203 (1953).
  32. HERSCHEL, SIR J. F. W.: Results of astronomical observations made during the years 1834, 5, 6, 7, 8 at the Cape of Good Hope; being the completion of a telescopic survey of the whole surface of the visible heavens, commenced in 1825. Cornhill: Smith, Elder and Co. 1847.
  33. HUBBLE, E. P.: Astrophysic. J. 97, 112-118 (1943).

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