Author	Davey, R.J. and Williams, G.L.
Year	1966a
Journal	Bull. Brit. Mus. (Nat. Hist.) Geol., Suppl. vol.3 pp.28-52
Title	The genera Hystrichosphaera and Achomosphaera

Abstract Davey, R.J. and Williams, G.L., 1966; The genera Hystrichosphaera and Achomosphaera. Bull. Brit. Mus. (Nat. Hist.) Geol., Suppl. vol.3 pp.28-52