ENCYCLOPEDIA OF THE SOCIAL SCIENCES. Vol.2. Editor-in-chief, Edwin R. A. Seligman; associate editor, Alvin Johnson.
ENCYCLOPEDIA OF THE SOCIAL SCIENCES. Vol.2. Editor-in-chief, Edwin R. A. Seligman; associate editor, Alvin Johnson. © 16Sep30; A27526. Macmillan Co. (PCW); 16Apr58; R213070.
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