TY  - GEN
AU  - PLANTINGA, Alvin
TI  - The nature of necessity
SN  - 0 19 824404 5
AV  - BC 199 .M6 P55 
PY  - 1974///
CY  - Oxford
PB  - Clarendon press
KW  - Modality(Logic)
KW  - Essentialism(philosophy)
KW  - Necessity(Philosophy)
KW  - Good and evil
ER  -