TY - Front. Philos. China A1 - Yu Wujin T1 - Thing, Value, Time, and Freedom: A Consideration of Some Key Concepts in Marx’s Philosophical System Y1 - 2006-03-05 JF - Frontiers of Philosophy in China JO - Front. Philos. China SP - 114 EP - 123 VL - 1 IS - 1 UR - https://journal.hep.com.cn/fpc N1 - 10.1007/s11466-005-0011-2 ER -