TY  - BOOK
AU  - Calder,Nigel
TI  - Einstein's universe: a guide to the theory of relativity 
SN  - 0140135162
PY  - 1990///
CY  - Harmondsworth
PB  - Penguin Books Ltd.
KW  - Einstein, Albert,
KW  - Relativity (Physics)
KW  - Astrophysics
KW  - Cosmology
N1  - First published 1979 by Viking Press
ER  -