000 00653nam a2200229Ia 4500
008 191130s1963##################000#0#eng##
020 _a9780691079417
022 _a63009996
040 _aACL
_cACL
082 _a517.5 SAC
100 _aSacks, Gerald E
245 _aDegrees of unsolvability
_cGerald E. Sacks
250 _a2nd ed
260 _aPrinceton, N.J
_bPrinceton University Press
_c1963
300 _aix, 174 p. ; 24 cm.
500 _aBibliography: p. 173-174
650 _aRecursive functions
650 _aUnsolvability (Mathematical logic)
990 _a8585e4fdac10000c7bc3cb26b41eb030
991 _a100653
999 _c254513
_d254513