International Council of Scientific Unions. Mixed Commission on Ionosphere. Meeting (1st : 1948 : Brussels, Belgium) Proceedings of the first meeting : held in Brussels, from July 28th to 30th, 1948.

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International Council of Scientific Unions. Mixed Commission on Ionosphere. Meeting (1st : 1948 : Brussels, Belgium)

Proceedings of the first meeting : held in Brussels, from July 28th to 30th, 1948.

Ionosphere -- Congresses.