Science, exchange of notes between Canada and the European Space Research Organization (ESRO) (with memorandum of understanding), Ottawa and Neuilly-sur-Seine, May 18, 1972, entered into force May 18, 1972 = Science, échange de notes entre le Canada et l'Organisation Européenne de Recherces Spatiales (CERS) (avec mémorandum d'accord), Ottawa et Neuilly-sur-Seine, le 18 mai 1972, en vigueur le 18 mai 1972

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