oa MNASSA : Monthly Notes of the Astronomical Society of South Africa - Monthly notes: no. 21. The extra-galactic nebulae
The Astronomical Society of South Africa, Cape Centre, reports on their meeting and an article by Mr. Krumm: The discussion of the methods of estimating the distances of the nebulae leads to the consideration of one of the most interesting things about them - the so-called ""Red Shifts"".
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