This book constitutes the refereed proceedings of the 21st International Workshop on Graph-Theoretic Concepts in Computer Science, WG '95, held in Aachen, Germany, in June 1995. The WG workshop series contributes to integration in computer science by applying graph theoretical concepts in various areas as well as by taking up problems from practical applications and treating them theoretically. The book presents 30 carefully refereed revised papers selected from 52 submissions and reflects current activities in the field of computer science oriented graph theory, its computational aspects and its application.