TY  - RPRT
TI  - The plastic cone. A new device for marking microscopic fields.
AU  - W P HOREN
AU  - W G STRAUSS
PY  - 1961
DO  - 10.1093/ajcp/36.4.339
UR  - https://pubmed.ncbi.nlm.nih.gov/14448880/
ID  - 14448880
ER  -