【1】http://www.moggies.co.uk/html/oldpssm.html 【2】http://pan.baidu.com/share/link?shareid=228780886&uk=4097295981 【3】http://archive.org/stream/13clocks00jame/13clocks00jame_djvu.txt 【4】http://www.gutenberg.org/files/27085/27085-h/27085-h.htm