I-XVI -- 1 Introduction -- 2 Recent approaches to morphophonemics -- 3 Two models of language and language change -- 4 Two morphophonemic alternation patterns in Rusyn -- 5 The Rusyn study: Data collection and analysis -- 6 The "velar palatalization" pattern: A close-up view -- 7 The "dental palatalization" pattern in the spotlight -- 8 Conclusion -- Appendices -- A Distribution of adult subjects within the social structure -- B k-stem masculine nouns -- C Dental-stem masculine nouns -- D The "velar palatalization" pattern: Dendrograms -- E Adult subject groups for the "dental palatalization" pattern -- F Non-adult subject groups for the "dental palatalization" pattern -- Abstract -- Notes -- References -- Name index -- Subject index