1. A field trial of the protective effect of Samorin and Berenil in Zebu cattle under ranching conditions in Tanzania;Blaser;OAU/STRC. No. 110,1979
2. The economic losses caused by animal diseases;FAO-WHO-OIE,1963
3. Expert consultation on the programme for the control of African animal trypanosomiasis;FAO,1974
4. Assessment of the world food situation present and future;FAO-UN,1974
5. World production of animal protein and need for a new approach;FAO,1975