ATSINA GROS VENTRE - A'ANININ Atsina Territory: Southwestern Saskatchwan and northeastern Montana. PORTALS . Fort Belknap Indian Reservation : part of whose membership is Atsina < Fort Belknap, Montana * . >Vol. 13: P. ix, 62 + Vol. 13 - Part 2 of 2: P. 677 Atsina Population: United States - 3,700 / Canada - 0 A L G O N Q U I A N ARAPAHO -ADS- SEARCH ENGINE COLOSSUS International Directory of Search Engines Ezilon Directory North America