Improvement map for Torrey Pines Preserve, San Diego County, 1931 Description: Plan includes contour lines and elevation measurements Date: April 1931 Resource Type: still image Collection: Ralph D. Cornell Papers, 1925-1972
Grading plan for Verdugo Park, Glendale, 1945 Description: Plan includes contour lines and elevation measurements Date: October 1945 Resource Type: still image Collection: Ralph D. Cornell Papers, 1925-1972
Grading plan for Verdugo Park, Glendale, 1945 Description: Plan includes contour lines and elevation measurements Date: October 1945 Resource Type: still image Collection: Ralph D. Cornell Papers, 1925-1972
Improvement map for Torrey Pines Preserve, San Diego County, 1931 Description: Plan includes contour lines and elevation measurements Date: April 1931 Resource Type: still image Collection: Ralph D. Cornell Papers, 1925-1972
Grading plan for motel court, Los Angeles, 1946 Description: Plan includes flow and drainage details in main plan and 4 sections Date: February 14, 1946 Resource Type: still image Collection: Ralph D. Cornell Papers, 1925-1972