You are looking for
Design and Operation of an Electron Diffraction Camera for the Study of Small Crystalline Regions
Author:
Cockayne, D. J. H.
Journal:
Review of scientific instruments
ISSN:
0034-6748
Date:
08/1967
Volume:
38
Issue:
8
Page:
1097-1103
DOI:
10.1063/1.1720975