1. Seasonal and regional variations in coat characteristics of dairy cattle;Berman;Australian J. Agr. Res.,1961
2. Land and People in Nigeria;Buchanan,1955
3. The thermal effects of radiation intensity (light) on milk production, feed and water consumption, and body weight in Holstein, Jersey and Braham cows at temperatures 45°, 70°, abd. 80°F;Brody;Missouri Agr. Expt. Sta., Res. Bull.,1954
4. Man in Cold Environment;Burton,1955
5. Solar radiation estimates for Nigeria;Davies;Nigerian Geograph. J.,1966