1. A Study of Whistling Atmospherics. I. Occurrence
2. R. A. Helliwell and D. L. Carpenter, Whistlers-West IGY-IGC Synoptic Program, Final Report, 1961 Mar 20. Apply to Prof. Helliwell. (For address, see infra.)
3. An Attempt to observe Whistling Atmospherics near the Magnetic Equator
4. Some results of five years of whistler observations from Labrador to Antarctica
5. T. Laaspere, M. G. Morgan, and W. C. Johnson, Proc. IEEE, (in press).