Dreyer, J.L.E., 1888. A New General Catalogue of Nebulae and Clusters of Stars. Memoirs of the Royal Astronomical Society 49: 1-237.
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Dreyer, J.L.E., 1895. Index Catalogue of Nebulae found in the years 1888 to 1894, with Notes and Corrections to the New General Catalogue. Mem. R. Astron. Soc. 51: 185-228.
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Dreyer, J.L.E., 1908. Index Catalogue of Nebulae and Clusters of Stars, containing objects found in the years 1895 to 1907; with Notes and Corrections to the New General Catalogue and to the Index Catalogue for 1888-94. Mem. R. Astron. Soc. 59: 105-198.
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