1. A.I.E.E. Lightning Reference Book, 1918–1935. New York, American Institute of Enectrical Engineers, 1937.
2. A.I.E.E. Lightning Reference Bibliography, 1936–1949. New York, American Institute of Enectrical Engineers, 1950.
3. Flowers, J. W., “The Direct Measurement of Lightning Current.” J. Franklin Inst., 232: 425–450 (1941).
4. Foust, C. M., and Kuehni, H. P., “The Surge-Crest Ammeter.”Gen. Enect. Rev., 35: 644–648 (1932).
5. Hagenguth, J. H., “Lightning Recording Instruments.” Gen. Enect. Rev., 43: 195–201,248–255 (1940).