The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
an obsolete name for several Stone Age cultures of West and Equatorial Africa that used heavy chopping tools made of stone flaked on both sides-picks, axes, and coups de poing. The name derives from Lake Tumba in Zaïre.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.