Cross-References for IC 4756

0) Numbering system adopted in WEBDA
1) Kopf E. 1943, Astr. Nach. 274 no 2-3 -- Mitt. Hamburg 8 no 52 --
2) Graff K. 1922, Astr. Nach. 217, 311
3) Alcaino G. 1965, Lowell Obs. Bull. no 126
4) Bannister R.D. 1918, Astron. J. 31, 165
5) Herzog A.D., et al. 1975, Astron. Astrophys. Suppl. 19, 211