De Vaucouleurs G.; De Vaucouleurs A.; Corwin J. R. (1976), Second reference catalogue of bright galaxies, 1976, Austin: University of Texas Press (بالإنجليزية), vol. -1, p. 0, Bibcode:1976RC2...C......0D, QID:Q66617361
De Vaucouleurs G.; De Vaucouleurs A.; Corwin J. R. (1976), Second reference catalogue of bright galaxies, 1976, Austin: University of Texas Press (بالإنجليزية), vol. -1, p. 0, Bibcode:1976RC2...C......0D, QID:Q66617361