@book{UBHD-1071144, author={Erdei, Lázló and Erdei, László}, title={Gegensatz und Widerspruch in der Logik}, publisher={Akad. Kiadó}, address={Budapest}, year={1972}, pages={83 S.}, language={ger}, note={Literaturverz. S. 81-83}, keywords={Principium contradictionis}, library={UB [Signatur: 73 A 828]}, }