TY  - BOOK
AU  - Kaufman A A
AU  - Hansen R O
TI  - Principles of the Gravitational Method
SN  - 9780444529930
U1  - 531.14 KAU 
PY  - 2008///
CY  - UK
PB  - Elsevier
KW  - Kaufman A A
KW  - Principles Gravitational Method
ER  -