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Study of the lower ionosphere using a rocket-borne riometer
Study of field-aligned ionospheric E-region irregularities and sporadic E at HF
Solar occultation sounding of pressure and temperature using narrowband radiometers
Aerial photography and the use of helicopters in hydrography
Lateral waves in three-layered media
Rocket experiment of VLF and MF radio wave measurement by using a single loop antenna
Chemical and engineering aspects of odorized natural gas storage in porous media (2)