TY - CPAPER AU - M. Hortal BT - Seminar on Numerical Methods in Atmospheric Models, 9-13 September 1991 CY - Shinfield Park, Reading DA - 1991 LA - eng PB - ECMWF PP - Shinfield Park, Reading PY - 1991 SP - 261 EP - 280 T2 - Seminar on Numerical Methods in Atmospheric Models, 9-13 September 1991 TI - Formulation of the ECMWF model VL - II ER -