(i) Recurrent publications (number of issues in parentheses): Energy and Transport Newsletter (4); International Rivers and Lakes Newsletter (4); Natural Resources Forum (quarterly) (8); policy instruments for sustainable development (1);
i) Publications en série (nombre de publications entre parenthèses) : Energy and Transport Newsletter (4); International Rivers and Lakes Newsletter (4); Natural Resources Forum (trimestrielle) (8); instruments d'une politique de développement durable (1);