1. Competition for nodule formation between effective and ineffective strains of Rhizobium meliloti;Amarger;Soil Biology & Biochemistry,1981
2. Selection of Rhizobium strains on their competitive ability for nodulation;Amarger;Soil Biology & Biochemistry,1981
3. Quantitative study of nodulation competitiveness in Rhizobium strains;Amarger;Applied and Environmental Microbiology,1982
4. Methods of soil analyses used in the soil testing laboratory of Oregon State University Agricultural Experiment Station;Berg;Special Report 321,1978
5. Demonstration of heterogeneity in a natural population of Rhizobium phaseoli using variation in intrinsic antibiotic resistance;Beynon;Journal of General Microbiology,1980