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By Tilman Sauer; "The first comprehensive overview of the final version of the general theory of relativity was published by Einstein in 1916 after several expositions of preliminary versions and latest revisions of the theory in November 1915. A historical account of this review paper is given, of its prehistory, including a discussion of Einstein's collaboration with Marcel Grossmann, and of its immediate reception."

And S. N. Bose: The Principle of Relativity.

Author: Einstein, Albert, 1879-1955; Minkowski, Hermann, 1864-1909 Subject: Relativity (Physics) Publisher: Calcutta University of Calcutta

Thank you, yor_on.

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Do you have a link (not in german, possibly  [])?

I found on on the internet. See http://www.alberteinstein.info/gallery/pdf/CP6Doc30_English_pp146-200.pdf

Read page 156, especially where he says We thus find the ocurance of a gravitational field connected with the space-time variability of the g_s.

Recall the article I referenced above, http://xxx.lanl.gov/ftp/physics/papers/0204/0204044.pdf. It has all the relevant statements made by Einstein on this topic, at least all I could find.

Thank you Pmb.