Hall, Nancy. Explode the Code 3 1/2 / N. Hall & R. Price. - Cambridge, Massachusetts : Educators Publishing Service, Inc., 1991. - 124 p. : ill. ; 28 cm. - Explode the code . ISBN: 0-8388-1775-0 Subjects--Topical Terms: English LanguagePhonetics--Study and teachingReading (Primary)