4 Oct
2020
4 Oct
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Einstein's Theories of Relativity and Gravitation, by J. Malcolm Bird 63372 [Link: http://www.gutenberg.org/6/3/3/7/63372 ] [Files: 63372-8.txt; 63372-h.htm] Thanks to Jeroen Hellingman and the Online Distributed Proofreading Team at https://www.pgdp.net/ for Project Gutenberg (This book was produced from scanned images of public domain material from the Google Books project.) Regards, Al