Stream Ecology for trout fishers
Society for Freshwater Science
Trout Unlimited
American Museum of Fly Fishing
Catskill Fly Fishing Center and Museum
Theodore Gordon Flyfishers
Federation of Fly Fishers
Ecological Society of America
United States Geological Survey
Mayfly Central
Life in Freshwater
American Rivers
National Arbor Day Foundation
National Fish and Wildlife Foundation
The Nature Conservancy
The National Audubon Society
The Sierra Club
Wild Trout Trust
International Rivers
Izaak Walton League
