Wetlands Delineation Manual with criteria for wetland delineation from the U.S. Army Corps of Engineers. Supplements for Western Oregon and Eastern Oregon are also available. Published in January 1987.
The Oregon Department of State Lands requires the use of this combined 1988 and 1993 National Wetland Plant List (NWPL) list. This list was compiled in 2009.
A bibliography compiled by Kevin Erwin provides access to peer-reviewed research papers that describe the effects of climate change on wetlands around the world. York University, 2007.