The Online Books Page

Books by Parker S. Trefethen:

Books in the extended shelves:

• Trefethen, Parker S.: Exploratory experiments in guiding salmon fingerlings by a narrow D.C. electric field (U.S. Dept. of the Interior, Fish and Wildlife Service, 1955), also by U.S. Fish and Wildlife Service (page images at HathiTrust)
• Trefethen, Parker S.: Sonic equipment for tracking individual fish (U.S. Dept. of the Interior, Fish and Wildlife Service, 1956), also by U.S. Fish and Wildlife Service (page images at HathiTrust)

Find more by Parker S. Trefethen at your library, or elsewhere.