00587cam a2200169 4500 462472816 TxAuBib 20201217120000.0 201215s2020||||||||||||||||||||||||eng|u 64055 Project Gutenberg PGUSA eng TxAuBib Smith, W. Whately, 1892-1947, (Walter Whately.) A Theory of the Mechanism of Survival [Gutenberg] : The Fourth Dimension and its Applications / W. Whately Smith. Project Gutenberg, 2020. Public domain in the USA. Text. http://www.gutenberg.org/ebooks/64055