NGC 7550 (Arabic Wikipedia)

Analysis of information sources in references of the Wikipedia article "NGC 7550" in Arabic language version.

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Hickson P.; Mendes de Oliveira C.; Huchra J. P.; Palumbo G. G. C. (1992). "Dynamical properties of compact groups of galaxies". The Astrophysical Journal Letters (بالإنجليزية). 399: 353–367. Bibcode:1992ApJ...399..353H. DOI:10.1086/171932. ISSN:2041-8205. QID:Q66617618.
Karen Masters (فبراير 2007). "Groups of Galaxies in the Two Micron All Sky Redshift Survey". ج. 655 رقم 2. ص. 790–813. DOI:10.1086/510201. {{استشهاد بمجلة}}: الاستشهاد ب$1 يطلب |$2= (مساعدة)

Hickson P.; Mendes de Oliveira C.; Huchra J. P.; Palumbo G. G. C. (1992). "Dynamical properties of compact groups of galaxies". The Astrophysical Journal Letters (بالإنجليزية). 399: 353–367. Bibcode:1992ApJ...399..353H. DOI:10.1086/171932. ISSN:2041-8205. QID:Q66617618.

Hickson P.; Mendes de Oliveira C.; Huchra J. P.; Palumbo G. G. C. (1992). "Dynamical properties of compact groups of galaxies". The Astrophysical Journal Letters (بالإنجليزية). 399: 353–367. Bibcode:1992ApJ...399..353H. DOI:10.1086/171932. ISSN:2041-8205. QID:Q66617618.

Hickson P.; Mendes de Oliveira C.; Huchra J. P.; Palumbo G. G. C. (1992). "Dynamical properties of compact groups of galaxies". The Astrophysical Journal Letters (بالإنجليزية). 399: 353–367. Bibcode:1992ApJ...399..353H. DOI:10.1086/171932. ISSN:2041-8205. QID:Q66617618.

Hickson P.; Mendes de Oliveira C.; Huchra J. P.; Palumbo G. G. C. (1992). "Dynamical properties of compact groups of galaxies". The Astrophysical Journal Letters (بالإنجليزية). 399: 353–367. Bibcode:1992ApJ...399..353H. DOI:10.1086/171932. ISSN:2041-8205. QID:Q66617618.