Fry, Cynthia. The duke and the mole / [electronic resource] / by Cynthia Fry ; art by Françoise Dudal.. — Palo Alto, CA : : Behavioral Research Laboratories,, c1972.. — 63 p. : : col. ill. ; 26 cm. - A Sullivan Associates reader ; Fun reader 6.
"A linguistic reader, correlated with the vocabulary of Sullivan Reading Book 6."