In "A New Logology Cash Contest" in the May 1974 issue of Word Ways, Ralph Beaman invited readers to discover the linguistic principle governing the choice of thirteen words of one to six letters in length. To make the contest more difficult, he did not specify these words directly, but merely hinted at them using one-word definitions. His solution to the contest is paraphrased below.
Word Ways: Vol. 7
, Article 19.
Available at: http://digitalcommons.butler.edu/wordways/vol7/iss3/19