THE BOOK OF KNOWLEDGE; the children's encyclopedia. Vol. 1-20. Ed. 2. Ellen V. McLoughlin, editor-in-chief.
THE BOOK OF KNOWLEDGE; the children's encyclopedia. Vol. 1-20. Ed. 2. Ellen V. McLoughlin, editor-in-chief. © 22Jul43; A174392. Grolier, Inc. (PWH); 12Nov70; R494547.
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