Hommel, Rudolf P.
China at work : an illustrated record of the primitive industries of China's masses, whose life is toil, and thus an account of Chinese civilization. (New York, N.Y. : Published for the Bucks County Historical Society by John Day, 1937).
https://ia801508.us.archive.org/4/items/chinaatwork00rudo/chinaatwork00rudo_encrypted.pdf.
(Hom1)