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	1.	Some observations on the role of coliphages in the number of Escherichia coli in oxidation ponds. [electronic resource] by PRETORIUS, W A Producer: 19981101 In: The Journal of hygiene vol. 60 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	2.	A SYSTEMATIC STUDY OF THE GENUS SPIRILLUM WHICH OCCURS IN OXIDATION PONDS, WITH A DESCRIPTION OF A NEW SPECIES. [electronic resource] by PRETORIUS, W A Producer: 19961201 In: Journal of general microbiology vol. 32 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	3.	Impact of solids management on nutrient ratios for in-line wastewater prefermenters. [electronic resource] by Rössle, W H Pretorius, W A Producer: 20020117 In: Water science and technology : a journal of the International Association on Water Pollution Research vol. 44 Availability: No items available. Save to lists Add to cart (remove)
	4.	Abattoir effluent treatment and protein production. [electronic resource] by de Villiers, G H Pretorius, W A Producer: 20011228 In: Water science and technology : a journal of the International Association on Water Pollution Research vol. 43 Availability: No items available. Save to lists Add to cart (remove)

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