TY  - GEN
AU  - Buizza, R.
AU  - Montani, A.
TI  - Targeting  observations using singular vectors
T2  - Technical Memorandum
VL  - 286
PY  - 1999///
CY  - Reading
PB  - ECMWF
KW  - PREVISÃO NUMERICA
KW  - IM
ER  -