ENCYCLOPAEDIA OF THE SOCIAL SCIENCES. Vol.12. Edwin R. A. Seligman, editor-in-chief. Alvin Johnson, associate editor.
ENCYCLOPAEDIA OF THE SOCIAL SCIENCES. Vol.12. Edwin R. A. Seligman, editor-in-chief. Alvin Johnson, associate editor. © 27Feb34; A70417. Macmillan Co. (PCW); 22Dec61; R287244.
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