TY - CPAPER AU - A. McDonald 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 - 257 EP - 272 T2 - Seminar on Numerical Methods in Atmospheric Models, 9-13 September 1991 TI - Semi-Lagrangian methods VL - I ER -