TY  - DATA
AU  - M. Lerman
AU  -  J.H. Schmerl
AU  -  R.I. Soare
TI  - Logic Year 1979-80
T2  - Lecture Notes in Mathematics
SN  - 9783540386735
PY  - 1981///
CY  - Heidelberg
PB  - Springer Berlin
KW  - Mathematics and Statistics
UR  - https://doi.org/10.1007/BFb0090934
ER  -