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Filters: Author is Tollefson, Roger and Keyword is natural resource management  [Clear All Filters]
1950
Tollefson, Roger, Lowell D. Marriage, Donald Twahy, Stanley Wilkes, Charles Woelke, and Oregon. Fish Commission. Observations on horseclams of the 1949-50 set in Yaquina Bay In Shellfish Investigation Progress Report. Vol. no.21., 1950.
→ ir.library.oregonstate.edu/concern/technical_reports/2b88qd055
1949
Tollefson, Roger, Lowell D. Marriage, and Oregon. Fish Commission. Ghost shrimp, weights of crabs –- Oregon landings, souvenir crabs In Shellfish Investigation Progress Report. Vol. no.16., 1949.
→ ir.library.oregonstate.edu/concern/technical_reports/1544bq05s
1948
Tollefson, Roger, Lowell D. Marriage, and Oregon. Fish Commission. Crab fishery and soft-shell status – Area II: South of Cascade Head, July 31-August 6, 1948 In Shellfish Investigation Progress Report. Vol. no.12., 1948.
→ ir.library.oregonstate.edu/concern/technical_reports/x346d508p
Tollefson, Roger. "Present state of bay clams in Oregon." Research Briefs. Fish Commission of Oregon 1 (1948): p.3-9.
→ ir.library.oregonstate.edu/concern/technical_reports/3f462600t
1947
Tollefson, Roger, and Oregon. Fish Commission. The Yaquina Bay clam fishery: preliminary report In Shellfish zInvestigation Progress Report. Vol. no.2., 1947.
→ ir.library.oregonstate.edu/concern/technical_reports/8c97kq88b