Fundamental ideas and problems of the theory of relativity, by Einstein. 69572 [Full title: Fundamental ideas and problems of the theory of relativity] [Full author's name: Albert Einstein] [Author: Albert Einstein] [Link: https://www.gutenberg.org/6/9/5/7/69572] [File: 69572-h.htm] Thanks to Laura Natal Rodrigues (Images generously made available by the Nobel Foundation.) Regards, Roger