----------------------------Original message---------------------------- While going through some problem-children air photos, I came across some 1950s flights, done for the US Army Map Service by various commercial firms (eg Mark Hurd; Aero Services). Possibly they were used to generate the 1:250K topos. In any case - I'm checking to see if anyone has the photos and needs the indexes: Western US project no. 137, lot AV (we have sheet 3 of 9; alster and mark hurd; 1955); scale of photos 1:60K (the sheet we have is of w-central Colo) Western United States High Altitude project no. 146: we have both sheets of the 2-sheet index; w. 1/2 of Montana; scale of photos 1:61K; Aero Service Western U.S. Project 55 AM 81: we have 1& 2 of 4; sw ARizona(112-110W, 33-31N for entire project) Project 55 AM 43, "Series V502, sheet NM12-10": we have sh. 1&2 of 2; Flathead, Glacier, Pondera, Toole Counties, Montana; 1957-59 Western United States : Project no. 22502-569 - we have sheets NL10-3 (1957) and NM 11-11 (1958); western and very northern strip of Washington state. Mary L. Larsgaard, Map & Imagery Lab, Library, UC Santa Barbara; [log in to unmask]