Black, Adam, Charles (1875). Encyclopædia Britannica. Edinburgh. s.480. «Few trees grow on the islands, but there are some stunted shrubs of birch, willow and alder.»
Black, Adam, Charles (1875). Encyclopædia Britannica. Edinburgh. s.480. «Until 1867 these islands belonged to Russia, but they were included in the transfer to the United States of the whole Russian possesions in America made that year.»
