Dictionary of Nomenclature of Celestial Objects

 association yy = 0
    zz : If zz not given, then zz is assumed to be the same as |yy|    See also NBG: NBG galaxies are members of 36 clouds,    254 associations and 336 groups of two or more members.
 Auth.:TULLY R.B.+
 Auth.:TULLY R.B.
   Ref:=1987ApJ...321..280T
     byTULLY R.B.

 Astrophys. J., 321, 280-304 (1987)

    Nearby groups of galaxies. II. An all-sky survey within 3000
    kilometers per second.
oTable 2: <NBGG xx+yy +zz> N=340
=E=Catalogue in electronic form as VII/145

====Sorry, no entry could be found====