1. Guide to Scientific Instruments;Scherago;Science,1969
2. Survey of the Automatic Counting and Sizing of Particles;Walton;Brit. J. Appl. Phys.,1954
3. Stages in the Development of an Arrested Scan Type Microscopic Particle Counter;Dell;Brit. J. Appl. Phys.,1954
4. P. C. Reist, W. A. Burgess, and D. Yankovich, Development of an Automatic Particle Assaying Instrument Utilizing a Scanning Electron Microscope, annual meeting of Air Pollution Control Association, Paper No. 69–124, Pittsburgh, Pa., 1969.
5. The Automatic Size Analysis of Dust Deposits by Means of an Illuminated Slit;Le Bouffant;Brit. J. Appl. Phys.,1954