Chromey, F. R. (2016). To measure the sky: An introduction to observational astronomy (2a. ed.). Cambridge University Press.
Chicago Style (17th ed.) ZitazioaChromey, Frederick R. To Measure the Sky: An Introduction to Observational Astronomy. 2a. ed. Princeton: Cambridge University Press, 2016.
MLA (9th ed.) ZitazioaChromey, Frederick R. To Measure the Sky: An Introduction to Observational Astronomy. 2a. ed. Cambridge University Press, 2016.
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