How many people are there in winterveld?
ConclusionThe views presented in this paper give an indication of what can be expected from a properly conducted census in Winterveld. Certainly it will indicate a population much smaller than generally expected. Moreover, it brings into the spotlight what could be a general phenomenon: exaggerated informal population levels in South Africa, and, furthermore, it questions the reliability of indirect census survey procedures.
Urbanisation in Africa: lessons for urbanisation in the homelands.

 The author analyzes the socioeconomic and political consequences of urbanization in Africa. Similarities between selected African states and the homelands are investigated with respect to rate of urbanization, adequacy of housing and services, and unbalanced growth. The suitability of Western models and standards for application to Africa's urban development is examined

Suppressed Light Emission of the Reaction Zone in Detonation
THE detonation of high explosives in water can be photographed with an open camera and a flash light as the explosive gases do not emit light. The method has been used1 to investigate the spread of shock waves and explosive gases, and to investigate the initiation by shock waves2. We have found that it can be used also in certain gases such as butane and propane. The method is not suitable, on the other hand, for explosives with two levels of detonation velocity in the case of low velocity. A great part of the reaction then occurs after the reaction zone has passed and the expanding explosive gases are very luminous even in water.