The Commission on Environmental Planning : a report of the Commission on Environmental Planning, 1981-1984 1984
Director-General's report on the work of the Union since the 16th session of the IUCN General Assembly held in Madrid, November 1984 : triennial report 1985-1987 1987
Triennial report 1988-1990 : the work of the Union since the 17th session of the IUCN General Assembly, held in San José, Costa Rica in February 1988 1990
IUCN yearbook, 1975-76 : annual report of the International Union for Conservation of Nature and Natural Resources for 1975 and for January-May 1976 1976
IUCN yearbook : annual report of the International Union for Conservation of Nature and Natural Resources for 1973 1974
IUCN yearbook : annual report of the International Union for Conservation of Nature and Natural Resources for 1972 1973
