by Buermann, Y, Du Preez, H.H, Steyn, G.J. (Rand Afrikaans Univ., Auckland Park (South Africa). Dept. of Zoology and Research Unit for Aquatic and Terrestrial Ecosystems), Harmse, J.T, Deacon, A
Published in Koedoe (1995)

by Seymore, T, Du Preez, H.H, Van Vuren, J.H.J, Deacon, A, Strydom, G. (Rand Afrikaans Univ., Auckland Park (South Africa). Dept. of Zoology and Research Unit for Aquatic and Terrestrial Ecosystems)
Published in Koedoe (1994)

by Du Preez, H.H., Swanepoel, A., Cloete, N.
Published in Water S. A. (01.01.2017)

by Wepener, V., Van Vuren, J.H.J., Du Preez, H.H.
Published in Koedoe (1999)

by Du Preez, H.H., Van der Merwe, M., Van Vuren, J.H.J.
Published in Koedoe (1997)

by Gagiano, C.L., Steyn, G.J., Du Preez, H.H.
Published in Koedoe (01.08.1996)

by Sigudu, M.V, Retief, F, Du Preez, H.H, Du Preez, H.H
Published in Water S. A. (01.04.2014)

by Smit, L., Du Preez, H.H., Steyn, G.J.
Published in Koedoe (1998)

by Van der Merwe, Marinda, Van Vuren, J.H.J., Du Preez, H.H.
Published in Koedoe (25.09.1993)

by Grobler, E., Van Vuren, J.H.J., Du Preez, H.H.
Published in Comparative biochemistry and physiology. C, Comparative pharmacology (1989)

by Avenant-Oldewage, A., Retief, N-R., Du Preez, H.H.
Published in Water S. A. (01.04.2009)

by Wepener, V., Euler, N., Van Vuren, J.H.J., Du Preez, H.H., Kohler, Astri
Published in Koedoe (1992)

by Retief, N-R, Avenant-Oldewage, A., du Preez, H.H.
Published in Physics and chemistry of the earth. Parts A/B/C (2007)

by WOLMARANS, E, DU PREEZ, H. H, DE WET, C. M. E, VENTER, S. N
Published in Water Science & Technology (01.01.2005)

by Du Preez, H.H, McLachlan, A
Published in Journal of experimental marine biology and ecology (01.01.1983)

by Wepener, V., Van Vuren, J.H.J., Du Preez, H.H.
Published in Water S. A. (01.01.2001)

by Lepono, T, Du Preez, H H, Thokoa, M
Published in Water science and technology (01.01.2003)

by Kotze, P.J.(Rand Afrikaans Univ., Auckland Park (South Africa). Zoology Dept.)E-mail:pk@rau.ac.za, Steyn, G.J, Du Preez, H.H, Kleynhans, C.J
Published in African journal of aquatic science

by Van Vuren, J.H.J., Van der Merwe, Marinda, Du Preez, H.H.
Published in Ecotoxicology and environmental safety (01.11.1994)

by Nussey, G., van Vuren, J.H.J. & du Preez, H.H.
Published in Water S. A. (01.04.2000)