int spkez_( integer    *targ    ,
            doublereal *et      ,
            char       *ref     ,
            char       *abcorr  ,
            integer    *obs     ,
            doublereal *starg   ,
            doublereal *lt      ,
            ftnlen      ref_len ,
            ftnlen      abcorr_len )

Example 2: f2c created interface.