1. Ice features and ice-thrust shore forms at Luodonselka, Gulf of Bothnia, in winter 1972-73;Alestalo;Fennia,1976
2. Effective forces of floating ice on structures;Allen,1970
3. A Personal Narrative of the Discovery of the Northwest Passage;Armstrong,1857
4. U.S. Revenue Cutter Service-Alaska file of the Revenue Cutter Service,1891
5. Outer Continental Shelf Energy Program,1975