TY  - BOOK
AU  - Spruyt,C.B.
AU  - Honigh,M.
TI  - Leerboek der formeele logica
U1  - 160 
PY  - 1903///
CY  - Haarlem 
PB  - Vincent Loosjes
KW  - Logic
KW  - Study and teaching
ER  -