TY  - RPRT
TI  - NEW FOCUSABLE STAND MAGNIFIERS.
AU  - L L SLOAN
PY  - 1964
DO  - 10.1016/0002-9394(64)91376-5
UR  - https://pubmed.ncbi.nlm.nih.gov/14218393/
ID  - 14218393
ER  -