TY  - RPRT
TI  - A modified mask for "open" ether.
AU  - C V Singh
AU  - G L Kamra
DO  - 10.1111/j.1365-2044.1979.tb06385.x
UR  - https://pubmed.ncbi.nlm.nih.gov/517728/
ID  - 517728
ER  -