Horizontal and vertical Differentiation Processes in the German Education SystemWerner Helsper,Heinz-Hermann Krueger,Roland Bloch,Alexander MitterleZEITSCHRIFT FUR PADAGOGIK(2019)引用 0|浏览0暂无评分AI 理解论文溯源树样例生成溯源树,研究论文发展脉络Chat Paper正在生成论文摘要