Off median phenomena and international reference ionoshpere : proceedings of the COSPAR International Scientific Symposium held in Trieste, Italy, 19-22 October 1993 /
COSPAR International Scientific Symposium(1993 :Trieste, Italy)
Rawer, K.(Karl),1913-
Piggott, W. R.
Paul, A. K.
Oxford : Pergamon [for] The Committee on Space Research,
1994.