NGC 663 (Arabic Wikipedia)

Analysis of information sources in references of the Wikipedia article "NGC 663" in Arabic language version.

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Pandey, A. K.؛ Upadhyay, K.؛ Ogura, K.؛ Sagar, Ram؛ وآخرون (2005). "Stellar contents of two young open clusters: NGC 663 and 654". Monthly Notices of the Royal Astronomical Society. ج. 358 ع. 4: 1290–1308. Bibcode:2005MNRAS.358.1290P. DOI:10.1111/j.1365-2966.2005.08784.x.

Per Collinder (1931), On Structural Properties of Open Galactic Clusters and their Spatial Distribution. Catalog of Open Galactic Clusters (PDF) (بالإنجليزية), vol. 2, p. 1, Bibcode:1931AnLun...2....1C, QID:Q28806527
Philibert Jacques Melotte (1915). "A Catalogue of Star Clusters shown on Franklin-Adams Chart Plates" (PDF). Memoirs of the Royal Astronomical Society (بالإنجليزية). 60: 175–186. Bibcode:1915MmRAS..60..175M. ISSN:0369-1829. QID:Q28806590.
Pandey, A. K.؛ Upadhyay, K.؛ Ogura, K.؛ Sagar, Ram؛ وآخرون (2005). "Stellar contents of two young open clusters: NGC 663 and 654". Monthly Notices of the Royal Astronomical Society. ج. 358 ع. 4: 1290–1308. Bibcode:2005MNRAS.358.1290P. DOI:10.1111/j.1365-2966.2005.08784.x.

Philibert Jacques Melotte (1915). "A Catalogue of Star Clusters shown on Franklin-Adams Chart Plates" (PDF). Memoirs of the Royal Astronomical Society (بالإنجليزية). 60: 175–186. Bibcode:1915MmRAS..60..175M. ISSN:0369-1829. QID:Q28806590.