1990 status review: Northern spotted owl, S̲ṯṟi̲x̲ o̲c̲c̲i̲ḏe̲ṉṯa̲ḻi̲s̲ c̲a̲u̲ṟi̲ṉa - Anderson, David R.; U.S. Fish and Wildlife Service. (U.S. Fish and Wildlife Service, 1990)
"April 30, 1990."
Keywords: Wildlife management / Northwest, Pacific.; Endangered species / Northwest, Pacific.; Spotted owl.