Wolski, P., & Gumbricht, T. (2003). Mapping hydrological units in the Okavango Delta. HOORC, University of Botswana, Maun. 18 p.
Wolski, P., & Gumbricht, T. (2003). Mapping hydrological units in the Okavango Delta. HOORC, University of Botswana, Maun. 18 p.