谁能帮我找一下这两个数据集。论文中也给出了数据集获取连接：
[54] Monthly critical radio frequencies in Washington, D.C. 1934-1954, (n.d.). datamarket.com/data/%0Aset… in-washington-dc-may-1934%0A-april-1954-these-frequencies-reflect-the-highest-radio-frequency-thatcan-be-used-for-broadcasting#!ds=22u2&display=line.
[62] Monthly closings of the Dow-Jones industrial index, aug. 1968-aug. 1981, (n.d.), 1968, datamarket.com/data/%0Aset… industrial- index-aug-1968-%0Aaug-1981#!ds=22v9& display=line.
但是我点开后是一个Qlik的网站。谁有这两个数据集，谁能帮我找一下这两个数据集？
