The Pipeline Newsletter was formerly edited by the National Small Flows Clearinghouse (NSFC) and is now edited by the National Environmental Service Center based at the West Virginia University (USA). Popular with small community officials, citizens, maintenance and inspection personnel, and community educators, each quarterly issue of Pipeline focuses on a single wastewater topic and presents it in an easy-to-read format. This issues deals with attached-growth processes, including trickling filters, rotating biological contactors, sand filters, peat filters, textile filters and subsurface flow wetland.
NSFC (2004): The Attached Growth Process – An old technology takes on new forms. (= Pipeline , 1 / 15 ). Morgantown: National Small Flows Clearinghouse URL [Accessed: 22.04.2010]