TY  - RPRT
TI  - [Instruments for testing small optical details and knots].
AU  - Iu A Tsepelev
AU  - V G Khor'kov
AU  - E A Bulanova
PY  - 1971
UR  - https://pubmed.ncbi.nlm.nih.gov/5150598/
ID  - 5150598
ER  -