TY - RPRT TI - Comparison of power output and exhaust pollutants of two postal service vehicles operated on three hydrocarbon fuels AU - Hill, J E AU - Didion, D A PY - 1973 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS IR 74-460 DO - 10.6028/NBS.IR.74-460 ER -