TY  - RPRT
TI  - [Methods for determining the population's demand for eyeglass optical items].
AU  - P G Makarov
AU  - O M Novikov
AU  - I F Romanov
PY  - 1970
UR  - https://pubmed.ncbi.nlm.nih.gov/5447291/
ID  - 5447291
ER  -