Copenhagen Symposium on Functioning of Terrestrial Ecosystems at the Primary Production Level & Eckardt, F. (1968). Functioning of terrestrial ecosystems at the primary production level: Proceedings of the Copenhagen Symposium held in Copenhagen from 24 to 30 July 1965. United Nations Educational, Scientific and Cultural Organization.
Chicago-viite (17. p.)Copenhagen Symposium on Functioning of Terrestrial Ecosystems at the Primary Production Level ja F.E Eckardt. Functioning of Terrestrial Ecosystems at the Primary Production Level: Proceedings of the Copenhagen Symposium Held in Copenhagen from 24 to 30 July 1965. Paris: United Nations Educational, Scientific and Cultural Organization, 1968.
MLA-viite (9. p.)Copenhagen Symposium on Functioning of Terrestrial Ecosystems at the Primary Production Level ja F.E Eckardt. Functioning of Terrestrial Ecosystems at the Primary Production Level: Proceedings of the Copenhagen Symposium Held in Copenhagen from 24 to 30 July 1965. United Nations Educational, Scientific and Cultural Organization, 1968.