Catalogue of plants, which are sold by Conrad Loddiges and Sons, nurserymen, at Hackney, near London - Conrad Loddiges & Sons (Printed by W. Wilson, 1820)

Fauna of the Aleutian Islands and Alaska Peninsula - Murie, Olaus Johan, 1889 -1963 (Dept. of the Interior, U.S. Fish and Wildlife Service, 1959)