Yellen, JE; AS Brooks; E Cornelissen; MJ Mehlman; K Stewart (28 April 1995). "A middle stone age worked bone industry from Katanda, Upper Semliki Valley, Zaire". Science. 268 (5210): 553–556. Bibcode:1995Sci...268..553Y. doi:10.1126/science.7725100. PMID7725100.
Brooks, Alison S.; Smith, Catherine C. (December 1987). "Ishango revisited: new age determinations and cultural interpretations". The African Archaeological Review. 5 (1): 65–78. doi:10.1007/BF01117083. S2CID129091602.
harvard.edu
ui.adsabs.harvard.edu
Yellen, JE; AS Brooks; E Cornelissen; MJ Mehlman; K Stewart (28 April 1995). "A middle stone age worked bone industry from Katanda, Upper Semliki Valley, Zaire". Science. 268 (5210): 553–556. Bibcode:1995Sci...268..553Y. doi:10.1126/science.7725100. PMID7725100.
nih.gov
pubmed.ncbi.nlm.nih.gov
Yellen, JE; AS Brooks; E Cornelissen; MJ Mehlman; K Stewart (28 April 1995). "A middle stone age worked bone industry from Katanda, Upper Semliki Valley, Zaire". Science. 268 (5210): 553–556. Bibcode:1995Sci...268..553Y. doi:10.1126/science.7725100. PMID7725100.
semanticscholar.org
api.semanticscholar.org
Brooks, Alison S.; Smith, Catherine C. (December 1987). "Ishango revisited: new age determinations and cultural interpretations". The African Archaeological Review. 5 (1): 65–78. doi:10.1007/BF01117083. S2CID129091602.
