Author: Clark, J.D., 1961.:
Title: Fracured chert specimens from the Lower Pleistocene, Bethlehem Beds, Israel.
Description: Bull. Brit. Mus. (Nat. Hist.), Geol., 5(4): pp. 71-90, several photos, figs., and diagrs. on 9 pls., refs, orig. wrs.

Keywords: