TY  - RPRT
TI  - [Ring focusing collimators for scanning].
AU  - E A Ispenkov
AU  - V I Kudin
AU  - A M Liutsko
AU  - L D Soshin
PY  - 1967
UR  - https://pubmed.ncbi.nlm.nih.gov/5621328/
ID  - 5621328
ER  -