TY - RPRT TI - Relation between different thymineless mutants derived from Escherichia coli. AU - R R Roepke PY - 1967 DO - 10.1128/jb.93.3.1188-1189.1967 UR - https://pubmed.ncbi.nlm.nih.gov/5337831/ ID - 5337831 ER -