Abstract
Wednesday, April 19 ROYAL MICROSCOPICAL SOCIETY, at 5.30.—Prof. L. O. Martin: “The Electron Microscope from the Optical Standpoint”.
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Forthcoming Events. Nature 143, 654 (1939). https://doi.org/10.1038/143654a0
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DOI: https://doi.org/10.1038/143654a0