1. Photo‐electric Colorimetry: Determination of Blood Iron and Haemoglobin;Andes J. E.;The Journal of Laboratory and Clinical Medicine,1938
2. The Error of Estimate of the Blood Cell Count as Made with the Hæma‐cytometer;Berkson J.;The American Journal of Physiology,1940
3. Photo Electric Determination of Erythrocyte Count: Basic Principles and Technique;Blum L.;American Journal of Clinical Pathology,1945
4. Photo Electric Determination of Erythrocyte Count: Clinical Application;Blum L.;ibidem,1946