Born-Digital or AnalogAnalogTranscriptDenver. Traffic W. T. Plum invents new type of muffler. To dim the roar of Diesel trucks and etc. Post Nov. 11 1952 Clips,;.Diog..Plum.. W._ T. Fines cost Denver drivers $1 million in 1954. RAN Jan. 7, 1955 p.28 Judges say no excusing of tickets. News May 19, 1956 p.5 Revolutionized by Barnes. Post Sept. 14, 1951 p.22 Electronic "brain" to control traffic. Post Mar. 9, 1952 p.laCollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
