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  • Aspekte van die ekologie van avifauna op 'n binnelandse lughawe
    颁布单位：[University of the Free State] |  颁布时间：1999 |  实施时间：1999 |  学科分类：[["Airport","Avifauna","Bird, hazard","Feeding, ecology","Harvester, termites","Pitfall, trapping","Grassland","Habitat, manipulation","Management","Animals, --, South, Africa, --, Bloemfontein","Airports, --, Bird, control, --, South, Africa, --, Bloemfontein","Airports, --, Environmental, aspects, --, South, Africa, --, Bloemfontein","Thesis, (Ph.D., (Zoology, and, Entomology))--University, of, the, Free, State,, 1999"]]
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  • The ecology and ecophysiology of Marion Island house mice, Mus Musculus L.
    颁布单位：[University of the Free State] |  颁布时间：1999 |  实施时间：1999 |  学科分类：[["Mice, --, Environmental, aspects, --, Marion, Island, (Prince, Edward, Islands)","Thesis, (D.Phil., (Zoology, and, Entomology))--University, of, the, Orange, Free, State,, 1999"]]
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  • Aspects of the behaviour and ecology of Gurney's Sugarbird Promerops Gurneyi verreaux, 1871, in Protea Woodland, South Africa
    颁布单位：[University of the Free State] |  颁布时间：1998 |  实施时间：1998 |  学科分类：[["Birds, --, Behavior","Birds, --, South, Africa, --, Environmental, aspects","Dissertation, (M.Sc., (Zoology, and, Entomology))--University, of, the, Free, State,, 1998"]]
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  • Salinity in the Struisbaai aquifer
    颁布单位：[University of the Free State] |  颁布时间：1998 |  实施时间：1998 |  学科分类：[["Aquifers, --, South, Africa, --, Struisbaai","Salinization, --, Environmental, aspects","Groudwater, --, Sodium, content, --, South, Africa, --, Struisbaai","Dissertation, (M.Sc., (Geohydrology))--University, of, the, Free, State,, 1998"]]
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  • Effect of spray volume, water quality, adjuvants and ammonium salts on sethoxydim activity
    颁布单位：[University of the Free State] |  颁布时间：1998 |  实施时间：1998 |  学科分类：[["Herbicides, --, Environmental, aspects","Tomatoes, --, Weed, control","Dissertation, (M.Sc.Agric.(Agronomy))--University, of, the, Free, State,, 1998"]]
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