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[Lecture Notes in Mathematics] Logic Year 1979–80 Volume 859 || Hierarchies of sets and degrees below 0′
Lerman, Manuel, Schmerl, James H., Soare, Robert I.Volume:
10.1007/BF
Year:
1981
Language:
english
DOI:
10.1007/BFb0090937
File:
PDF, 614 KB
english, 1981