1. The essentiality of cobalt for soybean plants grown under symbiotic conditions;Ahmed,1961
2. Le nickel et le cobalt des nodosites des legumineuses;Bertrand;Bulletin Societé de Chimie Biologique,1954
3. Ammonia assimilation by Rhizobium cultures and bacteroids;Brown;Journal of General Microbiology,1975
4. The effect of inoculation and cobalt application on the growth of and nitrogen fixation by sweet lupins;Chatel;Australian Journal of Agricultural Science,1978
5. Legume root nodule initiation and development;Dart,1975