Born-Digital or AnalogAnalogTranscriptColorado. Penitentiary. Canon city. Prison industries Inmates may begin to mine coal on state land. RM Journal Sec.l S 14, 1977 p.1,12 Organized labor and prison officials disagree on ratio of inmate labor to professionals on construction projects. Post N 1, 1977 p.56 Correctional industries will use high percentage of union labor on future construction at states prisons. Post N 11, 1977 p.3 40CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng