^"George W. Ackerman". إدارة الأرشيف والوثائق الوطنية. مؤرشف من الأصل في 2017-07-21. اطلع عليه بتاريخ 2008-06-29. During a nearly 40-year career with the Department of Agriculture, George W. Ackerman (1884-1962) estimated that he took over 50,000 photographs. Ackerman began working as a photographer for the Bureau of Plant Industry in 1910 at a salary of $900 a year. In 1917 he moved to the Federal Extension Service, and in that position, he traveled around the country photographing rural life. His photographs appeared in many private and Government agricultural publications, although they were not usually credited to him.
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