1. H. W. Zieler, The Optical Performance of the Light Microscope, Part 1, Microscope Publications Ltd., Chicago, Ill. 60616 (1972).
2. E. M. Chamot and C. W. Mason, Handbook of Chemical Microscopy, Vol. 1: Physical Methods, 3rd ed., John Wiley and Sons, Inc., New York, N. Y. 10016 (1958).
3. G. E. Schlueter and W. E. Gumpertz, The stereomicroscope: Instrumentation and techniques, American Laboratory, pp. 61–64, 66, 68–71 (April 1976).
4. R. B. McLaughlin, Accessories for the Light Microscope, Microscope Publications, Ltd., Chicago, Ill. 60616 (1975).
5. ASTM Special Technical Publication;RG Scott,1959