ENCYCLOPAEDIA OF THE SOCIAL SCIENCES. Vol.7. Edwin R. A. Seligman, editor-in-chief. Alvin Johnson, associate editor.
ENCYCLOPAEDIA OF THE SOCIAL SCIENCES. Vol.7. Edwin R. A. Seligman, editor-in-chief. Alvin Johnson, associate editor. © 7Jun32; A52348. Macmillan Co. (PCW); 5Apr60; R254679.
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