TY  - RPRT
TI  - Five million slides.
AU  - D Morley
AU  - F Savage
PY  - 1988
DO  - 10.1016/s0140-6736(88)90787-8
UR  - https://pubmed.ncbi.nlm.nih.gov/2459576/
ID  - 2459576
ER  -