TY  - RPRT
TI  - Natural selection in pathogens.
AU  - R Levins
PY  - 1994
DO  - 10.1111/j.1749-6632.1994.tb19876.x
UR  - https://pubmed.ncbi.nlm.nih.gov/7840456/
ID  - 7840456
ER  -