Johnson, G.Ulliman, J.Zasada, Z.A.Meyer, M.2010-02-222010-02-221973-10-15Johnson, G., Ulliman, J., Zasada, Z. and Meyer, M., (1973), "Application of 70mm Aerial Photography to Mechanized Timber Harvest Disturbance Assessment", Minnesota Forestry Research Notes 246, School of Forestry, University of Minnesota0544-3555https://hdl.handle.net/11299/58301Published as Scientific Journal Paper Series No. 8520 of the Minnesota Agricultural Experiment Station.en-USforests and forestryMinnesotaresearchReport