TY  - GEN
AU  - Penrose, Roger 
TI  - Cycles of time: an extraordinary new view of the universe
SN  - 9780099505945
U1  - 523.1 PEN/C 
PY  - 2011///
CY  - London
PB  - Vintage Books
KW  - Cyclic universe theory (Cosmology),
KW  - Universe -- Expansion
ER  -