TY - BOOK AU - Slaman, T.A., ed. AU - Cooper, S.B., ed. AU - wainer, S.S., ed. TI - Computability,enumerability, unsolvability: directions in recursion theory T2 - London mathematical society lecture note series SN - 0521557364 U1 - 511.3 PY - 1996/// CY - Cambridge PB - Cambridge University Press ER -