1. Back scattering of electrons;Archard;J. appl. Phys.,1961
2. Bishop , H.E. 1966 Electron scattering and X-ray production Ph.D. Thesis University of Cambridge
3. A new high resolution reflection scanning electron microscope;Broers;Rev. scient. Instrum.,1969
4. Catto , C.J.D. 1971 Production and storage display of the signal in the scanning electron microscope Ph.D. Thesis University of Cambridge