N. L. Delft Hydr Delft,
“Hydro Delft”. Delft Hydraulics, Delft, The Netherlands.
C. M. S. A. T. A. - Kumba en CM, C. Ministry o,
“Hydrology [Cameroon]”. Swiss Association for Technical Assistance (SATA), Kumba, Cameroon, p. 10 p. : fig., tab.
IAHS Publication. Wallingford, UK: IAHS Press, Institute of Hydrology.
IAMSLIC -San Diego, CA, US,
“Iamslic newsletter”. International Association of Aquatic and Marine Science Libraries and Informatio, San Diego, CA, USA.
ICLARM contribution. Penang, Malaysia: International Center for Living Aquatic Resources Management (ICLARM).