TY - RPRT AU - J.H. Andersen CY - Shinfield Park, Reading DA - 08/1977 LA - eng M1 - 15 M3 - Internal Report PB - ECMWF PP - Shinfield Park, Reading PY - 1977 EP - 42 TI - A routine for normal mode initialization with non-linear correction for a multi-level spectral model with triangular truncation ER -