TY  - BOOK
AU  - Kaufman,A.A
AU  - Hansen,R.O
TI  - Principles of the gravitational method / 
SN  - 9780444529930   
PY  - 2008///
CY  - Oxford
PB  - Elsevier, 
KW  - Gravity
KW  - Measurement
N1  - Includes Index
ER  -