TY  - RPRT
TI  - A simple approach to grey scale echography.
AU  - R Railton
AU  - A J Hall
PY  - 1975
DO  - 10.1259/0007-1285-48-575-921
UR  - https://pubmed.ncbi.nlm.nih.gov/1218303/
ID  - 1218303
ER  -