TY - Front. Agric. China A1 - Baoguo LI, Suping GUO, Guohui QI T1 - The main factors causing “imperfect shell development” (ISD) in thin-shelled walnut Y1 - 2009-03-05 JF - Frontiers of Agriculture in China JO - Front. Agric. China SP - 75 EP - 77 VL - 3 IS - 1 UR - https://academic.hep.com.cn/fag N1 - 10.1007/s11703-008-0062-y ER -