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Refined by: ?search=&sort=-Year_iso,_score&perpage=10&page=1&&refine[Creator][]=International+Council+of+Scientific+Unions+%28ICSU%29+&r&|||||&unrefine[Creator][]=Petersen%2C+S.R. Petersen, S.R. ?search=&sort=-Year_iso,_score&perpage=10&page=1&&refine[Creator][]=Petersen%2C+S.R.&r&|||||&unrefine[Creator][]=International+Council+of+Scientific+Unions+%28ICSU%29+ International Council of Scientific Unions (ICSU)