COUNTABLE MODELS AND THE THEORY OF BOREL EQUIVALENCE RELATIONS, Index for Countable models and the theory of Borel equivalence relations, MODEL THEORY OF DIFFERENCE FIELDS, Index for Model theory of difference fields, SOME COMPUTABILITY-THEORETIC ASPECTS OF REALS AND RANDOMNESS, Index for Some computability-theoretic aspects of reals and randomness, WEAK FRAGMENTS OF PEANO ARITHMETIC, Index for Weak fragments of Peano Arithmetic