00322nam a2200109Ia 4500008004100000082001100041082000800052245007500060245003400135260003400169300000900203231017s9999    xx            000 0 und d  a625.74  bBIR 0aChemical additive usage on unpaved roads in the mountain plains states 0cNorth Dakota State University  bNorth Dakota State University  c30cm