found: NUCMC data from University of Montana, K. Ross Toole Archives for Its Records, 1931-1981(in 1929, William J. Gallagher and Roy Robinson each purchased a one-third interest in Petrie Tractor & Equipment Company of Missoula, the Caterpillar equipment dealer for western Montana and Idaho; in 1930, they bought the original owner's share and renamed the business Westmont Tractor Company; company eventually had branches in Idaho Falls, Idaho, Kalispell, Libby, and Billings, Mont., and Spokane, Wash.)