1-13 of 13 Books
Ecology of the great grey owl
Ecology of the great grey owl
By Evelyn L. Bull
The great grey owl and its prey in Sweden
The great grey owl and its prey in Sweden
By Nils H. Höglund

Flammulated, boreal, and great gray owls in the United States
By Gregory D. Hayward

Planet Earth
By Alastair Fothergill,Jonny Keeling,Mark Brownlow
Der Bartkauz, Strix nebulosa
Der Bartkauz, Strix nebulosa
By Heimo Mikkola
Habitat requirements of Great Gray Owls in the central Sierra Nevada
Habitat requirements of Great Gray Owls in the central Sierra Nevada
By Correigh Greene,University of Michigan. School of Natural Resources and Environment

The great gray owl (Scotiaptex nebulosa nebulosa) (Forster) in Alberta with observations on some other species of owls
By Albert Frederick Oeming

Survey protocol for the great gray owl within the range of the Northwest Forest Plan
By Deborah L. Quintana-Coyer
Ecology of the great grau owl
Ecology of the great grau owl
By Evelyn L. Bull