TY  - RPRT
TI  - Another alternative to directed mutation.
AU  - R E Lenski
AU  - M Slatkin
AU  - F J Ayala
PY  - 1989
DO  - 10.1038/337123b0
UR  - https://pubmed.ncbi.nlm.nih.gov/2643054/
ID  - 2643054
ER  -