00648cam a2200205 4500 438119831 TxAuBib 20190925120000.0 200919s2020||||||||||||||||||||||||eng|u 63237 Project Gutenberg PGUSA eng TxAuBib Duff, E. Gordon, 1863-1924, (Edward Gordon.) Early Printed Books [Gutenberg] / E. Gordon Duff. Project Gutenberg, 2020. Public domain in the USA. Text. Incunabula -- Bibliography. Printing -- History -- Origin and antecedents. http://www.gutenberg.org/ebooks/63237 TXTLL