Four series of color photographs show different levels of downed woody material resulting from natural processes in four forest cover types in Montana. Each photo is supplemented by fuel inventory data and potential fire behavior ratings.
Fischer, William C. 1981. Photo guide for appraising downed woody fuels in Montana forests: Interior ponderosa pine, ponderosa pine - larch - Douglas-fir, larch - Douglas-fir, and interior Douglas-fir cover types. Gen. Tech. Rep. INT-GTR-97. Ogden, UT: U.S. Department of Agriculture, Forest Service, Intermountain Research Station. 133 p.