Public domain
Working of $3,000,000 map. (2) C.E. Kowalozyk, AAA worker, using a planimetor, which measures the exact acreage in each section of land surface photographed, 7/28/37
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Subjects
Credit lineWorking of $3,000,000 map. (2) C.E. Kowalozyk, AAA worker, using a planimetor, which measures the exact acreage in each section of land surface photographed, 7/28/37. 1937-01-01. Harris & Ewing. Harris & Ewing Collection, Library of Congress. Public domain.