Born-Digital or AnalogAnalogTranscriptCivil defense. Denver 3 sirens tested at noon today. 1943 -. c.] Post bond bombing to be used as air raid- test. Defense heads study blackout Colorado to have test Mav 23. To be May 23 at 4 p.m. Post ry 18, 1943 p.1,7 c.4 Mock bombing planned. Post my lo, 143 p.29 c.8CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
