Interviewing subjects in the field, from The Poor White Problem in South Africa.

Carnegie Corporation of New York and Rare Book and Manuscript Library, Columbia University

Family portrait, photograph from The Poor White Problem in South Africa.

Carnegie Corporation of New York and Rare Book and Manuscript Library, Columbia University

Road workers, image from the "Industry" section of The Poor White Problem in South Africa.

Carnegie Corporation of New York and Rare Book and Manuscript Library, Columbia University

"Children tested in the intelligence survey," photograph from The Poor White Problem in South Africa.

Carnegie Corporation of New York and Rare Book and Manuscript Library, Columbia University