Greyscale 8 bit/300 dpi, Color 24 bit/300 dpi Source https://usace.contentdm.oclc.org/digital/collection/p16021coll8/id/1249 Date digitized InfoField 2013...
date 1980 and Winter 1981 Accession number Source https://usace.contentdm.oclc.org/digital/collection/p16021coll8/id/2742 Date digitized InfoField 2014...