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'n Taksonomiese ondersoek van die Cunaxidae [Prostigmata : Acari] van die Etiopiese wyk
(North-West University (South Africa), 1975)
"Abstract not copied"
Die verspreiding, ekologie en bestrydingsaspekte van Lymnaea Truncatula [Müller] in Lesotho
(North-West University (South Africa), 1975)
"Abstract not copied"
An urban-geographical study of Randfontein
(North-West University, 1975)
Refer to full-text for the abstract
Die invloed van temperatuur en vog op die lewensiklus van 'n spesie van die mytgenus Caloglyphus [Acari]
(North-West University (South Africa), 1975)
This study was undertaken to determine the optimum
conditions for the survival of Caloglyphus sp. with
regard to air temperature and groundnut moisture
content.
The values of the temperatures and moisture contents
selected ...
'n Ondersoek na die verwydering van swaarmetale uit 'n mynuitvloeisel
(North-West University (South Africa), 1975)
The effluent from an uranium extraction plant contains
dissolved metals, the most abundant being manganese (J000
ppm), aluminium (2600 ppm) and iron (2200 ppm). Large
quantities of these metals are lost in the present ...