A Rapid Method for Measuring Strontium-90 Activity in Crops in China Lingjing Pan Pan, Guobing Yu, Deyun Wen, Zhi Chen, Liusi Sheng, Chung-King Liu and X. George Xu EPJ Web Conf., 153 (2017) 01003 Published online: 25 September 2017 DOI: 10.1051/epjconf/201715301003