1. Method 3.006 Iron and Aluminum,1970
2. Method 2.031 Determination of phosphorus,1970
3. Method 36.319 Iodine in drugs,1970
4. Method 22.021 Alkalinity of ash,1970
5. Culwick, G. M. 1950.A Dietary Survey among the Zande of the South‐Western Sudan,, 84Khartoum: Ministry of Agriculture, Agri. Publications Committee.