Robert Kraft (astrónomo) (Spanish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Robert Kraft (astrónomo)" in Spanish language version.

refsWebsite

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1books.google.com

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books.google.com

John Daintith (18 de agosto de 2008). «Biographical Encyclopedia of Scientists, Third Edition». google.ca. ISBN 9781420072723.

doi.org

dx.doi.org

R.P. Kraft (1967). «Studies of Stellar Rotation. V. The Dependence of Rotation on Age among Solar-Type Stars». Astrophysical Journal 150. p. 551. doi:10.1086/149359. Falta la |url= (ayuda)

sonoma.edu

phys-astro.sonoma.edu

«The Bruce Medalists: Robert P. Kraft». Consultado el 1 de febrero de 2010.

ucsc.edu

news.ucsc.edu

«Robert P. Kraft, eminent astronomer and former director of UC Observatories, dies at age 87». UC Santa Cruz News.