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	1.	Changes in vitamin A and C levels in black mine-workers. [electronic resource] by Visagie, M E Du Plessis, J P Groothof, G Alberts, A Laubscher, N F Producer: 19750414 In: South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde vol. 48 Availability: No items available. Save to lists Add to cart (remove)
	2.	Results of a dietary survey of white men between the ages of eighteen and retirement. [electronic resource] by Versluis, E E Groothof, G Laubscher, N F Du Plessis, J P Producer: 19731015 In: South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde vol. 47 Availability: No items available. Save to lists Add to cart (remove)
	3.	Effect of enrichment of maize meal with nicotinic acid and riboflavin upon the vitamin and protein nutritional status of young school-going and pre-school children. [electronic resource] by Du Plessis, J P Wittmann, W Groothof, G Laubscher, N F de Villiers, R Louw, M E Alberts, A Kruger, H van Twisk, P Producer: 19741111 In: South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde vol. 48 Availability: No items available. Save to lists Add to cart (remove)
	4.	Biochemical aspects of a study of 100 obese white subjects. [electronic resource] by Groothof, G Du Plessis, J P Versluis, E E Louw, M E Alberts, A Visagie, M E Laubscher, N F Galpin, J S Markham, R Producer: 19751007 In: South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde vol. 49 Availability: No items available. Save to lists Add to cart (remove)