TY  - BOOK
AU  - Schipper Edith Watson
AU  -  Schuh Edward
TI  - First course in modern logic
U1  - R1, J9 
PY  - 1959///
CY  - New York
PB  - Henry Holt U. S. A.     
KW  - Philosophy-Logic
N1  - Appendix: P 375-89
ER  -