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Applying radar technology to migratory bird conservation and management strengthening and expanding

Reston, Va. : U.S. Geological Survey, 2007. 2007

Cassin's sparrow (Aimophila cassinii) status assessment and conservation plan

Ruth, Janet M.
Denver, CO : U.S. Fish and Wildlife Service, [2000] 2000

Management and research applications of long-range surveillance radar data for birds, bats, and flyi

[Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, [2008] 2008

Molt and aging criteria for four North American grassland passerines

Pyle, Peter, 1957-
Shepherdstown, WV : U.S. Fish & Wildlife Service, [2008] 2008

Status assessment and conservation plan for the Grasshopper sparrow (Ammodramus savannarum)

Ruth, Janet M., author.
Falls Church, VA : Department of Interior, U.S. Fish & Wildlife Service, 2015. 2015