Number | Date | Country | Kind |
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2-31142 | Feb 1990 | JPX |
Entry |
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Binnig et al., Scanning Electron Microscopy, 1983 III, pp. 1079-1082. |
Ichinokawa et al., Ultramicroscopy 23 (1987), pp. 115-118. |
Vazquez et al., Rev. Sci. Instrum, 59(8), Aug. 1988, pp. 1286-1289. |