TY  - BOOK
AU  - Lorenzen Paul
AU  - Crosson F J
TI  - Formal logic
U1  - 164 
PY  - 1965///
CY  - Dordrecht
PB  - D.Reidel Pub
KW  - Mathematical logic
KW  - Symbolic logic
N1  - Translated form German
ER  -