00619cam a2200205 4500 133699170 TxAuBib 20090410120000.0 130410s2013||||||||||||||||||||||||eng|u 42547 Project Gutenberg PGUSA eng TxAuBib Abney, Capt. The Art and Practice of Silver Printing [Gutenberg] / by Capt. Abney and H. P. Robinson. Project Gutenberg, 2013. Project Gutenberg. Freely available. Electronic text. Robinson, H. P. http://www.gutenberg.org/license Rights TXTLL