TY  - BOOK
AU  - Penrose,Roger
TI  - The road to reality: a complete guide to the laws of the universe 
SN  - 9780679776314
AV  - QC20 .P366 2004
PY  - 2004///
CY  - New York
PB  - Vintage Books
KW  - Mathematical physics
KW  - Physical laws
ER  -