How to do spawning fish surveys
By: Salmon Trout Enhancement Program, Oregon Department of Fish and Wildlife.
Contributors: Oregon. Salmon Trout Enhancement Program.
Series: STEP; STEP
Publisher: The Program
Published: 1990
Place of publication: [Portland, Or.]
Language: eng
Subjects: Salmon -- Spawning.; Steelhead (Fish) -- Spawning.; Salmon -- Oregon -- Spawning.; Steelhead (Fish) -- Oregon -- Spawning.
Notes: Title from caption.