Sorting the cross-identifications for one reference

One can extract from the table the couples (BDA no - source no) for one reference and display them in the order of the numbers of the selected reference.

The equivalent forms of the command tab:

tab -s or tab -s no_col

do the job. If the column number is not given on the command line, the program will ask for it.

Example:

tab -s 
        Sort on which column?   0

NGC 2287  (07.03.88)

 1)  Cox A.N. 1954, Astrophys. J. 119, 188
 2)  Hoag A.A., et al. 1961, Publ. US Nav. Obs. 17, 347  (Pe)
 3)  Hoag A.A., et al. 1961, Publ. US Nav. Obs. 17, 347  (Pg)
 4)  Loden L.O. 1957, Ark. Astr. 2, 39

        Sort on which column?  2