Reader's Digest & Jean George. (1965). Maravillas y misterios del mundo animal (1a. ed.). Reader's Digest.

Reader's Digest and Jean George. Maravillas Y Misterios Del Mundo Animal. 1a. ed. Buenos Aires: Reader's Digest, 1965.

Reader's Digest and Jean George. Maravillas Y Misterios Del Mundo Animal. 1a. ed. Reader's Digest, 1965.