ENCYCLOPAEDIA OF THE SOCIAL SCIENCES. Vol. 9. Editor-in-chief: Edwin R. A. Seligman. Associate editor: Alvin Johnson.
ENCYCLOPAEDIA OF THE SOCIAL SCIENCES. Vol. 9. Editor-in-chief: Edwin R. A. Seligman. Associate editor: Alvin Johnson. © 10Jan33; A57869. Macmillan Co. (PCW); 4Jan61; R268700.
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