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Sonwalkar, VS, Helliwell RA, Inan US.  1990.  Wideband VLF electromagnetic bursts observed on the DE 1 satellite. Geophysical Research Letters. 17:1861-1864.
Helliwell, RA.  1997.  Whistlers, Discovery of the Magnetosphere. History of Geophysics. 7:83-94.
Guthart, H.  1964.  Whistlers in a Thermal Magnetosphere.
Helliwell, RA, Carpenter DL.  1963.  Whistlers Excited by Nuclear Explosions. Journal of Geophysical Research. 68:4409.
Helliwell, RA.  1964.  Whistlers and VLF Emissions. Research in Geophysics, Volume 1: Sun, Upper Atmosphere, and Space. 1:319.
Helliwell, RA.  1968.  Whistlers and VLF Emissions. Physics of the Magnetosphere. 10:106.
Helliwell, RA.  1965.  Whistlers and Related Ionospheric Phenomena.
Helliwell, RA, Carpenter DL.  1962.  Whistler-west results from the IGY-IGC-59 synoptic program. Trans. AGU. 43(1):125.
Helliwell, RA.  1963.  Whistler-Triggered Periodic Very-Low-Frequency Emissions. Journal of Geophysical Research. 68:5387.
Dunckel, N, Helliwell RA.  1969.  Whistler-Mode Emissions on the OGO 1 Satellite. Journal of Geophysical Research. 74:6371-6385.
Helliwell, RA, Katsufrakis J  P, Trimpi M  L.  1973.  Whistler-Induced Amplitude Perturbation in VLF Propagation. Journal of Geophysical Research. 78:4679-4688.
Park, CG.  1970.  A Whistler Study of the Interchange of Ionization Between the Ionosphere and the Protonosphere.
Angerami, JJ.  1966.  A Whistler Study of the Distribution of Thermal Electrons in the Magnetosphere.
III, N ST.  1977.  Whistler Propagation in a Distorted Quiet-time Model Magnetosphere.
Park, CG, Helliwell RA.  1977.  Whistler precursors - A possible catalytic role of power line radiation. Journal of Geophysical Research. 82:3634-3642.
Helliwell, RA, Walworth K  F.  1996.  Whistler mode wave intensities in the radiation belts. American Institute of Physics Conference Series. 383:61-64.
Allcock, G  M, Branigan C  K, Mountjoy J  C, Helliwell RA.  1963.  Whistler and Other Very-Low-Frequency Phenomena Associated with the High-Altitude Nuclear Explosion on July 9, 1962. Journal of Geophysical Research. 68:735-739.
Inan, US, Chang H  C, Helliwell RA, Katsufrakis J  P, Imhof W  L.  1985.  Wave-induced precipitation as a loss process for radiation belt particles. Advances in Space Research. 5:243-245.
Bell, TF.  1964.  Wave Particle Gyroresonance Interactions in the Earth's Outer Ionosphere.
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Chang, DCD.  1978.  VLF Wave-Wave Interaction Experiments in the Magnetosphere.
Helliwell, RA.  1988.  VLF wave-injection experiments from Siple Station, Antarctica. Advances in Space Research. 8:279-289.
Helliwell, RA.  1988.  VLF wave-injection experiments from Siple Station, Antarctica. Advances in Space Research. 8:279-289.
Helliwell, RA.  1988.  VLF wave-injection experiments from Siple Station, Antarctica. Advances in Space Research. 8:279-289.
Helliwell, RA.  1988.  VLF wave-injection experiments from Siple Station, Antarctica. Advances in Space Research. 8:279-289.
Helliwell, RA.  1988.  VLF wave stimulation experiments in the magnetosphere from Siple Station, Antarctica. Reviews of Geophysics. 26:551-578.