TY  - BOOK
AU  - Armstrong D M
TI  - What is a law of nature
T2  - Cambridge Studies in Philosophy
SN  - 0 521 25343 8
U1  - R3, M3 
PY  - 1983///
CY  - Cambridge
PB  - Cambridge University Press        
KW  -  Philosophy
KW  - Metaphysics
ER  -