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Color photomicrography.
BUTTERFIELD JV. BUTTERFIELD JV. Educ Focus. 1946;17(2):11-8. Educ Focus. 1946. PMID: 21027054 No abstract available.
So, I made a microscope.
BORGSTEDT FJ. BORGSTEDT FJ. Educ Focus. 1946 Fall;17(3):15-7. Educ Focus. 1946. PMID: 20284345 No abstract available.