2004				Google Scholar
2003				15th edition of CMOS
1997				Publication of "The Footnote"
1985				MLA style manual
1982				13th edition of the CMOS
1955				impact factor
1950				development of citation indexing
1906				Chicago Manual of Style
1828				Controversy over Ranke's footnotes
1778				Davis attacks Gibbon's "Decline and Fall"