ISBN 9780821805954 books & textbook
Decision Problems for Equational Theories of Relation Algebras (Memoirs of the American Mathematical Society)
Andreka, Hajnal Givant, Steven R. Nemeti, Istvan
Amer Mathematical Society /1997-01-01 Paperback / 126 Pages
isbn-10: 0821805959 / isbn-13: 9780821805954
