TY - GEN AU - Romero,E AU - Meynell,E TI - Covert fi- R factors in fi+ R+ strains of bacteria SN - 0021-9193 PY - 1969///0422 KW - Colicins KW - biosynthesis KW - Coliphages KW - Conjugation, Genetic KW - Drug Resistance, Microbial KW - Escherichia coli KW - Extrachromosomal Inheritance KW - Genetics, Microbial KW - Selection, Genetic KW - Transduction, Genetic N1 - Publication Type: Journal Article UR - https://doi.org/10.1128/jb.97.2.780-786.1969 ER -