1. Electrocardiographic observations on 500 unselected young adults at work
2. Cardiovascular observations, including a series of electrocardiograms of 1812 midshipmen without heart symptoms;FERGUSON D.;U. S. Nav. Bull.,1926
3. Electrocardiography in military medicine, with special reference to its lack of value in the study of recruits;WOOD F. C.;War Med.,1941
4. Analysis of the electrocardiograms obtained from 1000 young healthy aviators
5. KLEINE E. M. AND HESS J. H.: The electrocardiogram in industrial medicine: a report based on 2 000 electrocardiograms. Indust. A\ed. 16: 378 1947.