CCD UBV $\mathit{UBV}$ photometry of the open cluster NGC 6819 T. Ak,Z. F. Bostancı, T. Yontan,S. Bilir,T. Güver, S. Ak, H. Ürgüp,E. PaunzenAstrophysics and Space Science(2016)引用 12|浏览1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