Reference

	Webb Society Deep-Sky Observers Handbook, Vol. 2: Planetary and Gaseous Nebulae by Kenneth Glyn Jones, Peter I. Manly Year: 1979 Hits: 2888 Date insert: Monday, 31 December 2018
	Webb Society Deep-Sky Observers Handbook. Volume 7: The Southern Sky by Kenneth Glyn Jones, Peter I. Manly Year: 1987 Hits: 2768 Date insert: Monday, 31 December 2018
	Webb Society Deep-Sky OWebb Society Deep-Sky Observers Handbook. Volume 6: Anonymous Galaxies by Kenneth Glyn Jones, Peter I. Manly Year: 1987 Hits: 2800 Date insert: Monday, 31 December 2018
	What Star Is That? by Peter Lancaster Brown Year: 1971 Hits: 2806 Date insert: Monday, 31 December 2018