Source: Special Collections, City of Chicago Graphics and Reproduction Center Photograph, 1980 February 15, cgp_spe_c00148_014_019_001_n022A
Department of Streets and Sanitation: O'Hare Airport snow plowing, 1980 February 15. Source: Special Collections, City of Chicago Graphics and Reproduction Center Photograph, cgp_spe_c00148_014_019_001_n022A