Polish Logic is an anthology of papers by several authorsâÂÂKazimierz Ajdukiewicz, Leon Chwistek, Stanislaw Jaskowski, Zbigniew Jordan, Tadeusz Kotarbinski, Stanisà Âaw Leà Âniewski, Jan à Âukasiewicz, Jerzy Sà Âupecki, and Mordchaj WajsbergâÂÂpublished in 1967 and covering the period 1920–1939. The work focuses on the contributions of Polish logicians, more particularly, mathematical logicians, to modern logic.