 RETRIEVE,
    CLASS      = OD,
    TYPE       = FCMAX,
    STREAM     = SFMM,
    EXPVER     = 0001,
    REPRES     = GG,
    LEVTYPE    = SFC,
    PARAM      = 167,
    DATE       = 19911001,
    FCMONTH    = 2/3/4,
    TIME       = 0000,
    NUMBER     = 0/1/2/3/4,
    DOMAIN     = G,
    SYSTEM     = 2,
    METHOD     = 1,
    SOURCE     = mod.cl.surface,
    TARGET     = data.reference,
    DATABASE   = file