TY  - RPRT
TI  - A compensation filter for chest portals.
AU  - J A Purdy
AU  - D J Keys
AU  - F Zivnuska
DO  - 10.1016/0360-3016(77)90135-3
UR  - https://pubmed.ncbi.nlm.nih.gov/599073/
ID  - 599073
ER  -