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- [7] THE RESOLVING POWER OF THE MAGNETIC ELECTRON MICROSCOPE JOURNAL OF SCIENTIFIC INSTRUMENTS, 1945, 22 (09): : 170 - 174
- [8] On the influence of the condensor on the resolving power of a microscope PROCEEDINGS OF THE KONINKLIJKE NEDERLANDSE AKADEMIE VAN WETENSCHAPPEN, 1942, 45 (6/10): : 814 - 819