1. Cahen-Vachette, M. (1988): Le craton ouestafricain et le bouelier guyanais: un seul craton au Protérozoique inferieur?-Journal African Earth Sciences 7, 479–488; Oxford.
2. Culver, S. J., Williams, H. R. & Venkatakrishnan, R. (1991): The Rokelide Orogen.-In: The West African Orogens and Circum-Antlantic Correlatives, R. D. Dalmeyer & J. P. Lécorché (eds.), 123–150; Springer, Berlin Heidelberg.
3. Hurley, P. M., Leo, G. W., White, R. W. & Fairborn, H. W. (1971): Liberian age province (about 2,700 m. y.) and adjacent provinces in Liberia and Sierra Leone.-Geol. Soc. America Bull. 82, 3483–3490.
4. Nair, A. M. & Dorbor, J. K. (1990): Industrial minerals of Liberia.-Industrial Minerals, March 1990, 137.
5. Tysdal, R. G. & Thorman, C. H. (1983): Geologic Map of Liberia, 1:1,000,000.-US Geol. Surv. Misc. Invest. Ser. Map I 1480; Washington.