National Research Council (U.S.). Highway Research Board, Burggraf, F., & Campbell, M. E. (1970). Ideas & actions: A history of the Highway Research Board 1920-1970. National Research Council, National Academy of Sciences.
Chicago-Zitierstil (17. Ausg.)National Research Council (U.S.). Highway Research Board, Fred Burggraf, und M. Earl Campbell. Ideas & Actions: A History of the Highway Research Board 1920-1970. Washington, D.C.: National Research Council, National Academy of Sciences, 1970.
MLA-Zitierstil (8. Ausg.)National Research Council (U.S.). Highway Research Board, et al. Ideas & Actions: A History of the Highway Research Board 1920-1970. National Research Council, National Academy of Sciences, 1970.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.