TY - BOOK AU - Cooper S Barry ed. ED - Logic Colloquium '97 - European Meeting of the Association for Symbolic Logic (6-13 Jul 1997 : Leeds,England) ED - Logic colloquium '97 - European meeting of the Association for symbolic logic TI - Sets and proofs: invited papers SN - 0-521-63549-7 U1 - 511.32 PY - 1999/// CY - Cambridge PB - CUP KW - Set theory ER -