Ground-water quality for two areas in the Fort Peck Indian Reservation, northeastern Montana, 1993-2000 /

Shipping list no.: 2004-0076-P."December 2003."Includes bibliographical references (p. 15).Mode of access: Internet

Extent, magnitude, and sources of nitrate in the Flaxville and underlying aquifers, Fort Peck Indian Reservation, northeastern Montana /

Shipping list no.: 1998-0316-P.Includes bibliographical references (p. 19-21).Mode of access: Internet