ENCYCLOPAEDIA OF THE SOCIAL SCIENCES. Vol.15. Edwin R. A. Seligman, editor-in-chief. Alvin Johnson, associate editor.
ENCYCLOPAEDIA OF THE SOCIAL SCIENCES. Vol.15. Edwin R. A. Seligman, editor-in-chief. Alvin Johnson, associate editor. © 11Jun35; A84226. Macmillan Co. (PCW); 30Aug62; R300646.
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