00722nam a2200205Ia 4500 IN-BaIIA 211028s9999 xx 000 0 eng d IIA Library 50 UNE UNESCO 4782 Use and conservation of the biosphere UNESCO Paris UNESCO 1970 272p. Natural Resources Research; v. 10 Biosphere 6441 Conservation 6442 United Nations Educational Scientific and Cultural Organisation 6443 Intergovernmental Conference of Experts on the Scientific Basis for Rational Use and Conservation of the Resources of the Biosphere, Paris, 1968 6444 BK 3634 3634 0 0 0 0 BAN BAN GEN 1970-12-03 29.15 0 50/ UNE 4057 2021-11-05 29.15 1970-12-03 BK Rs. 29.15