N.-R. Retief , A. Avenant-Oldewage , H. du Preez
Physics and Chemistry of The Earth 31 ( 15) 840 -847
NR Retief , A d Avenant-Oldewage , HH Du Preez
Water Sa 35 ( 3)
NR Retief , A Avenant-Oldewage , HH Du Preez
Water SA 35 315 -322
NR Retief , A Avenant-Oldewage , H du Preez1&2
S Ibhadon , MC Emere , MS Abdulsalami , V Yilwa
Pakistan Journal of Nutrition 13 ( 12) pp: 50 -pp: 50
N-R Retief , A. Avenant-Oldewage , H.H. du Preez
Physics and Chemistry of The Earth 32 ( 15) 1384 -1390
Nico-Ronaldo Retief
University of Johannesburg (South Africa)