Cross-References for NGC 1857
0) Numbering system adopted in WEBDA
1) Cuffey J. 1937, Ann. Harv. Coll. Obs. 105,433
2) Babu G.S.D 1989, J. Astrophys. Astr. 10, 295
3) Purgathofer A. 1964, Ann. Univ. Sternw. Wien 26 no 2
4) Sujatha S. et al. 2006, Bull. Astr. Soc. India 34, 357
5) Colegrove P.T. 1999, Thesis (PhD). University of Nevada, Reno