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Proceedings of open meetings of working groups on physical sciences of the seventeenth plenary meeting of COSPAR , S ã o Paulo , S . P . , Brazil , June 1974 / organized by the Committee on Space Research - COSPAR and the " Instituto de pesquisas espaciais - INPE " of Brazil ; edited by M . J . Rycroft
Proceedings of open meetings of working groups on physical sciences of the seventeenth plenary meeting of COSPAR, São Paulo, S.P., Brazil, June 1974 / organized by the Committee on Space Research - COSPAR and the "Instituto de pesquisas espaciais - INPE" of Brazil ; edited by M.J. Rycroft
(COSPAR space research ; 15)