The mammalian dihydrofolate reductase locus.

@article{Hamlin1990TheMD,
  title={The mammalian dihydrofolate reductase locus.},
  author={Joyce L. Hamlin and Chunling Ma},
  journal={Biochimica et biophysica acta},
  year={1990},
  volume={1087 2},
  pages={107-25}
}