TY  - RPRT
TI  - Double targeted gene replacement for creating null mutants.
AU  - A Cruz
AU  - C M Coburn
AU  - S M Beverley
PY  - 1991
DO  - 10.1073/pnas.88.16.7170
UR  - https://pubmed.ncbi.nlm.nih.gov/1651496/
ID  - 1651496
ER  -