Objects
O'Keeffe, Jay H, Coetzee, Yvette. Water Research Commission; 1996. Status report on the Kruger National Park Rivers Research Programme: A synthesis of results and assessment of progress to January 1996.
Rowntree, Kate M, Wadeson, Roy A, O'Keeffe, Jay H. The development of a geomorphological classification system for the longitudinal zonation of South African rivers. 2000.
Madikizela, B R, Dye, Arthur H, O'Keeffe, Jay H. Water Research Commission; 2001. Water quality and faunal studies in the Umzimvubu catchment, Eastern Cape, with particular emphasis on species as indicators of environmental change.