00615cam a2200193 4500 581817625 TxAuBib 20220716120000.0 220715s2022||||||||||||||||||||||||eng|u 68530 Project Gutenberg PGUSA eng TxAuBib Tutton, A. E. H, 1864-1938, (Alfred Edwin Howard.) Crystals [Gutenberg] / A. E. H. Tutton. Project Gutenberg, 2022. Project Gutenberg ; 68530 Public domain in the USA. Electronic text. Project Gutenberg ; 68530. http://www.gutenberg.org/ebooks/68530