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Wymeersch P. Jan Schmücker & Stefaan van den Abbeele, “Zaïre. een Geologisch Schandaal” NCOS / Davidsfonds / lnfodok, Brussel / Leuven / Amsterdam, 1991, 95. biz. AF [nternet]. 1992 Nov. 11 [cited 2024 Nov. 15];8(2). vailable from: http://206.189.126.38:8087/index.php/AF/article/view/17834