Ionospheric informatics : proceedings of an International (URSI and COSPAR sponsored) Workshop held in Novgorod, U.S.S.R., 25-29 May, 1987 /
International Workshop on Ionospheric Informatics(1st :1987 :Novgorod, U.S.S.R.)
COSPAR.
International Union of Radio Science.
Oxford : Published for the Committee of Space Research by Pergamon,
1988.