Ed Cray and Marilyn Eisenberg Herzog (January 1967). "The Absurd Elephant: A Recent Riddle Fad". Western Folklore. 26 (1): 27–36. doi:10.2307/1498485. JSTOR1498485.
Ed Cray and Marilyn Eisenberg Herzog (January 1967). "The Absurd Elephant: A Recent Riddle Fad". Western Folklore. 26 (1): 27–36. doi:10.2307/1498485. JSTOR1498485.