The Universal Book of Astronomy: From the Andromeda Galaxy to the Zone of Avoidance by David Darling (2003), p. 260.
haroldconnolly.com
M. K. Weisberg; T. J. McCoy, A. N. Krot (2006). "Systematics and Evaluation of Meteorite Classification". In D. S. Lauretta; H. Y. McSween, Jr. (eds.). Meteorites and the early Solar System II(PDF). Tucson: University of Arizona Press. pp. 19–52. ISBN978-0-8165-2562-1. Archived from the original(PDF) on 14 May 2019. Retrieved 15 December 2012.
M. K. Weisberg; T. J. McCoy, A. N. Krot (2006). "Systematics and Evaluation of Meteorite Classification". In D. S. Lauretta; H. Y. McSween, Jr. (eds.). Meteorites and the early Solar System II(PDF). Tucson: University of Arizona Press. pp. 19–52. ISBN978-0-8165-2562-1. Archived from the original(PDF) on 14 May 2019. Retrieved 15 December 2012.