Notes (1) on Two Tribula or Threshing-Sledges, having their under surfaces studded with rows of chipped flints, for threshing corn on a threshing-floor, from Cavalla in European Turkey, now presented to the Museum; and (2) on Primitive Implements and Weapons made of Flakes of Flint or other Stone set in Wood or other substances.and (2) on primitive implements and weapons made of flakes of flint or other stone, set in wood or other substances

Mann, L. (1904). Notes (1) on Two Tribula or Threshing-Sledges, having their under surfaces studded with rows of chipped flints, for threshing corn on a threshing-floor, from Cavalla in European Turkey, now presented to the Museum; and (2) on Primitive Implements and Weapons made of Flakes of Flint or other Stone set in Wood or other substances.and (2) on primitive implements and weapons made of flakes of flint or other stone, set in wood or other substances. Proceedings of the Society of Antiquaries of Scotland, 38, 506-519. Retrieved from http://journals.socantscot.org/index.php/psas/article/view/6991