TY  - GEN
AU  - Duvall,Wilbur I.
AU  - Aggson,James R.
ED  - United States.
TI  - Least squares calculation of horizontal stress from more than three diametral deformations in vertical boreholes
T2  - Report of investigations
PY  - 1980/// [i.e. 1979]
CY  - [Washington]
PB  - Dept. of the Interior, Bureau of Mines
KW  - Rock mechanics
KW  - Statistical methods
KW  - Least squares
KW  - Boring
ER  -