TY  - BOOK
AU  - Roger Penrose
ED  - Roger Penrose
TI  - What Came Before the Big Bang?: Cycles of Time 
SN  - 9780099505945
AV  - QB991.C92P46 2011 
PY  - 2010///
CY  - London 
PB  - Random House
KW  - Cosmogony.  Cosmology
ER  -