Bulk composition of sedimentary organic matter used in paleoenvironmental reconstructions : examples from the tropical belt of South America and Africa /Sifeddine, Abdelfettah /Wirrmann, Denis Albuquerque, A.L.S. Gurgel, M.H.C. /Turcq, Bruno Campello Cordeiro, R. Joao Abrao, J. PALEOENVIRONNEMENT QUATERNAIRE HOLOCENE SEDIMENTATION LACUSTRE MATIERE ORGANIQUE RAPPORT C/N DATATION ANALYSE ISOTOPIQUE PETROGRAPHIE COUVERT VEGETAL 2004 text https://www.documentation.ird.fr/hor/fdi:010034421 fdi:010034421 Sifeddine Abdelfettah, Wirrmann Denis, Albuquerque A.L.S., Gurgel M.H.C., Turcq Bruno, Campello Cordeiro R., Joao Abrao J.. Bulk composition of sedimentary organic matter used in paleoenvironmental reconstructions : examples from the tropical belt of South America and Africa. 2004, 214, 41-53 EN AFRIQUE DE L'OUEST AMERIQUE DU SUD BRESIL BOLIVIE CAMEROUN GHANA