Skousen, Royal Jon, 1945-. Substantive evidence for morphological and phonetic regularities in phonology [microform] / by Royal Jon Skousen. - Ann Arbor, Mich. : University Microfilms International, 1973. - 1 microfilm reel : positive ; 35 mm. Thesis (Ph.D.) - University of Illinois, 1972 Subjects--Topical Terms: Grammar, Comparative and general--phonology.