A socio-biological study of the aquatic resources and their utilisation in an underdeveloped rural region, the Mutshindudi River Catchment (Volume 1)
A socio-biological study of the aquatic resources and their utilisation in an underdeveloped rural region, the Mtshindudi River catchment (Volume 2)
Water quality and faunal studies in the Umzimvubu catchment, Eastern Cape, with particular emphasis on species as indicators of environmental change
An assessment of the water quality of the Isinuka springs in the Transkei region of the Eastern Cape, Republic of South Africa