TY  - RPRT
TI  - [Progress in practical microscopy].
AU  - R BARER
PY  - 1951
DO  - 10.1111/j.1365-2818.1951.tb00387.x
UR  - https://pubmed.ncbi.nlm.nih.gov/13070312/
ID  - 13070312
ER  -