00528cam a2200169 4500 387230356 TxAuBib 20180725120000.0 190724s2019||||||||||||||||||||||||eng|u 59980 Project Gutenberg PGUSA eng TxAuBib Schneider, Edward John. Comparison of Methods of Sewage Purification [Gutenberg] / Edward John Schneider. Project Gutenberg, 2019. Public domain in the USA. Text. http://www.gutenberg.org/ebooks/59980