1 - A theory of formal deducibility |
2 - Algebraic methods of mathematical logic |
3 - Algebraic systems |
4 - An essay in modal logic |
5 - Aspects of mathematical logic, Centro internazionale matematico estivo III Ciclo - Varenna, 9-17 Settembre 1968 |
6 - Begriffsschrift und andere Aufsätze |
7 - Cabal Seminar 76-77 : proceedings, Caltech-UCLA logic seminar 1976-1977 |
8 - Cambridge Summer school il mathematical logic : held in Cambridge/England, August 1 - 21, 1971 |
9 - Contributions to mathematical logic : proceedings of the logic colloquium, Hannover, 1966 |
10 - Einführung in die operative Logik und Mathematik |