Penzien, J., Bundschuh, F. J., & Los, P. R. (1977). Highway Photomontage manual. distributed by U.S. Dept. of Transportation, Federal Highway Administration, Region 15, Demonstration Projects Division.

Penzien, John, Frank J. Bundschuh, and Paul R. Los. Highway Photomontage Manual. Arlington, VA.: distributed by U.S. Dept. of Transportation, Federal Highway Administration, Region 15, Demonstration Projects Division, 1977.

Penzien, John, et al. Highway Photomontage Manual. distributed by U.S. Dept. of Transportation, Federal Highway Administration, Region 15, Demonstration Projects Division, 1977.