TY  - BOOK
AU  - Bergmann,Peter Gabriel
TI  - The riddle of gravitation
SN  - 9780486273785
AV  - QC6.B499.R533 1992 
PY  - 1992///
CY  - New York
PB  - Dover Publications
KW  - Relativity (Physics)
KW  - Gravitation
N1  - 1 (pages 223-226) and index; 2
UR  - http://catdir.loc.gov/catdir/description/dover031/92022218.html
ER  -