ان‌جی‌سی ۹۷۲ (Persian Wikipedia)

Analysis of information sources in references of the Wikipedia article "ان‌جی‌سی ۹۷۲" in Persian language version.

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Vennik, J.; Richter, G. M. (1994). "Surface Photometry of Low-Surface-Brightness Galaxies in the Area of the NGC 972 Group of Galaxies". Symposium - International Astronomical Union (به انگلیسی). 161: 553–555. doi:10.1017/S0074180900048075. ISSN 0074-1809.
Vennik, J.; Richter, G. M. (1994). "Photometry of groups of galaxies. II. The NGC 972 group". Astronomische Nachrichten (به انگلیسی). 315 (3): 245–251. doi:10.1002/asna.2103150306. ISSN 1521-3994.

Vennik, J.; Richter, G. M. (1994). "Photometry of groups of galaxies. II. The NGC 972 group". Astronomische Nachrichten (به انگلیسی). 315 (3): 245–251. doi:10.1002/asna.2103150306. ISSN 1521-3994.

Vennik, J.; Richter, G. M. (1994). "Surface Photometry of Low-Surface-Brightness Galaxies in the Area of the NGC 972 Group of Galaxies". Symposium - International Astronomical Union (به انگلیسی). 161: 553–555. doi:10.1017/S0074180900048075. ISSN 0074-1809.
Vennik, J.; Richter, G. M. (1994). "Photometry of groups of galaxies. II. The NGC 972 group". Astronomische Nachrichten (به انگلیسی). 315 (3): 245–251. doi:10.1002/asna.2103150306. ISSN 1521-3994.