TY  - BOOK
AU  - Dirac,P.A.M.
TI  - Directions in physics
AV  - QC71.D55 
PY  - 1978///
CY  - New York
PB  - John Wiley and Sons
KW  - Physics
KW  - Addresses
KW  -  essays
KW  - lectures
ER  -