Liberia

1. Jenkins, Jack / Mokuwa, Esther Yei / Peters, Krijn / Richards, Paul (2020): Changing women's lives and livelihoods: motorcycle taxis in rural Liberia and Sierra Leone. In: Proceedings of the Institution of Civil Engineers - Transport, v. 173, n. 2 (April 2020), S. 1-12.

   https://doi.org/10.1680/jtran.18.00162

2. Pont de Johnson Street au Libéria. Vorgetragen bei: Technique française du Béton Précontraint, IXe Congrès de la FIP Stockholm 1982, S. 48.
3. Pont de Saint-Paul River au Libéria. Vorgetragen bei: Technique française du Béton Précontraint, IXe Congrès de la FIP Stockholm 1982, S. 61.
4. Ziama, Jacob Arku / Li, Bo (2018): Residents Post-Occupancy Evaluation of Social Housing in Liberia. In: Journal of Building Construction and Planning Research, v. 6, n. 1 ( 2018), S. 1-22.

   https://doi.org/10.4236/jbcpr.2018.61001