1. The future of the electron microscope;COSSLETT;J. Roy. Micr. Soc.,1967
2. Electron microscopy;FISHER;Anal. Chem.,1968
3. Die Entwicklungsgeschichte des Elektronenmikroskops;GABOR;Elektrotech. Z.,1957
4. History of electron optics;MARTON,1961
5. The history of the electron microscope;MULVEY,1967