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Burnside and Tepley(1990)
Burnside, R. G., and C. A. Tepley, Airglow intensities observed in the Southern and Northern Hemispheres, Planet. Space Sci., 38, 1,161-1,177, 1990.

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Djuth, F. T., J. H. Elder, and M. P. Sulzer, High resolution observations of HF-induced plasma waves in the ionosphere, Geophys. Res. Lett., 17, 1,893-1,896, 1990.

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Gordon and Duncan(1990)
Gordon, W. E., and L. M. Duncan, Historical Overview of HF Ionospheric Modification Research, in AGARD, Ionospheric Modification and its Potential to Enhance or Degrade the Performance of Military Systems, vol. 8, 1990.

Hagen(1990)
Hagen, J. B., Noise Parameter Transformations for Three-Terminal Amplifiers, IEEE Transactions on Microwave Theory and Techniques, 38, 319-321, 1990.

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Ierkic, H. M., R. F. Woodman, and P. Perillat, Ultrahigh vertical resolution radar measurements in the lower stratosphere at Arecibo, Radio Sci., 25, 941-952, 1990.

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Isham, B., W. Kofman, T. Hagfors, B. Thidé, C. La Hoz, and P. Stubbe, New phenomena observed by ESICAT during RF ionospheric modification experiment, Radio Sci., 25, 251-262, 1990.

Johnson(1990)
Johnson, M. W., Electron density comparison between radar observations and 3-D ionospheric model calculations, Master's thesis, Utah State University, Logan, Utah, 1990.

Melendez-Alvira(1990)
Melendez-Alvira, D. J., Theory and measurements of nighttime horizontal gradients in the mid-latitude F region, Ph.D. thesis, University of Michigan, Ann Arbor, MI, 1990.

Noble and Djuth(1990)
Noble, S. T., and F. T. Djuth, Simultaneous Measurements of HF-Enhanced Plasma Waves and Artificial Field-Aligned Irregularities at Arecibo, J. Geophys. Res., 95, 15,195-15,207, 1990.

Noble and Gordon(1990)
Noble, S. T., and W. E. Gordon, The Generation of ULF Waves in the Ionosphere, in AGARD, Ionospheric Modification and its Potential to Enhance or Degrade the Performance of Military Systems, vol. 8, 1990.