O.P. · O.W. · Office of · W.P.
| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Operation and Maintenance of Wastewater Collection Systems; A Field Study Training Program | 978-1-884701-44-3 | 2004 | |
| Operation of Wastewater Treatment Plants | 978-1-884701-46-7 | 2003 | |
| Operation of Wastewater Treatment Plants: A Field Study Training Program, Volume 1: 5th Edition | 978-1-884701-35-1 | 2002 | U.S. Environmental Protection Agency |
| Operation of Wastewater Treatment Plants, Volume 1 | 978-1-59371-005-7 | 2004 | |
| Small Water System Operation and Maintenance | 978-1-59371-041-5 | 2009 | |