Born-Digital or AnalogAnalogTranscriptRailroads. Burlington northern incorporated Wally Schirra rides the Denver Zephyr. Burlington Bulletin #44 O-N-D 1969 p.3 Progress 1969 plans for 1970. Burlington Bulletin //44 O-N-D 1969 p.12,13 Coverage on railroad merger with Great Northern; Northern Pacific; and Spokane, Portland, and Seattle. Maps. RMN Mr 3,.1970 p.66 Two daily trains from Chicago to Denver will be dropped Post Ap 2, 1970 p.61LCollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng