Born-Digital or AnalogAnalogTranscriptPotash U.S. Borax and Chemical Corp. will close Carlsbad, N.M. new mexico potash operation. Post 0 16, 1967 p.51 New mining process made possible by black vinyl plastic in Utah. Post Je 24, 1971 p.74CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
