TY  - RPRT
TI  - Letter: Frequency of cystic-fibrosis gene.
AU  - M D Crawfurd
PY  - 1975
DO  - 10.1016/s0140-6736(75)91468-3
UR  - https://pubmed.ncbi.nlm.nih.gov/46082/
ID  - 46082
ER  -