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BRUNDTLAND GRO HAILEN, . (1987). OUR COMMON FUTURE. NEW YORK: OXFORD UNIV. PRESS.
BRUNDTLAND GRO HAILEN, . 1987. OUR COMMON FUTURE. NEW YORK: OXFORD UNIV. PRESS.
BRUNDTLAND GRO HAILEN, . OUR COMMON FUTURE. NEW YORK: OXFORD UNIV. PRESS. 1987.