You searched for: Subject Environment Remove constraint Subject: Environment Subject Biology and Ecology Remove constraint Subject: Biology and Ecology Institution Stanford Remove constraint Institution: Stanford Place Massachusetts Remove constraint Place: Massachusetts Place United States Remove constraint Place: United States Place Delaware Remove constraint Place: Delaware Place Arizona Remove constraint Place: Arizona Data type Line Remove constraint Data type: Line
1966. Patuxent Wildlife Research Center. This line shapefile portrays the current routes used for conducting Breeding Bird Surveys in the lower 48 States. This layer is part of the 1997-20... National Atlas of the United States.