Reader's Digest & Jean George. (1965). Maravillas y misterios del mundo animal (1a. ed.). Reader's Digest.
Chicago-čujuhus (17. p.)Reader's Digest juo Jean George. Maravillas Y Misterios Del Mundo Animal. 1a. ed. Buenos Aires: Reader's Digest, 1965.
MLA-čujuhus (9. p.)Reader's Digest juo Jean George. Maravillas Y Misterios Del Mundo Animal. 1a. ed. Reader's Digest, 1965.
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