Changes to 71/236/Euratom: Council Decision of 21 June 1971 adopting a five-year research and training programme of the European Atomic Energy Community in the field of biology and health physics
EU Decision 1971/236
Made by Council Decision of 14 May 1973 amending the Decision of 21 June 1971 adopting a five-year research and training programme of the European Atomic Energy Community in the field of biology and health physics
From legislation.gov.uk's record of changes, the official one: see it there.