Kistchinski, A.A. 1978. [Birds of the Koryak Highlands.]
(no publisher listed...)
Stepanyan, L.S. 1975. [A distributional check-list of birds of the U.S.S.R.]
(again, no publishing info...)
There may be additional refs. for the situation in Alaska, but I hope this
is a start.
Jim Mountjoy
Biology
Bowdoin College
Brunswick ME 04011