Stable isotope ratios in wood show little potential for sub-country origin verification in Central Africa

Laura E. Boeschoten; Mart Vlam; Ute Sass-Klaassen; Barbara Rocha Venâncio Meyer-Sand; Arnoud Boom; Gaël U.D. Bouka; Jannici C.U. Ciliane-Madikou; Nestor Laurier Engone Obiang; Mesly Guieshon-Engongoro; Joël J. Loumeto; Dieu-merci M.F. Mbika; Cynel G. Moundounga; Rita M.D. Ndangani; Dyana Ndiade Bourobou; Peter van der Sleen; Steve N. Tassiamba; Martin T. Tchamba; Bijoux B.L. Toumba-Paka; Herman T. Zanguim; Pascaline T. Zemtsa; Pieter A. Zuidema