1. Molecular genetic analysis of Klebsiella pneumoniae nitrogen fixation (nif) genes;Ausubel,1981
2. Molecular cloning of nitrogen fixation (nif) genes from Klebsiella pneumoniae and Rhizobium meliloti;Ausubel,1982
3. Physical and genetic characterization of the gInA-gInG region of the Escherichia coli chromosome;Backman,1981
4. Location of nodulation and nitrogen fixation genes on a high molecular weight plasmid of R. meliloti;Banfalvi;Mol. Gen. Genet.,1981
5. Polarity of Tn5 insertion mutations in Escherichia coli;Berg;J. Bacteriol.,1980