Wikipedia's page on macros had really no history on it at all. I added some, including references to Kohlbecker and Clinger. If anyone wants to make it better (or correct the terrible guesses I made about FEXPRs), take a look at it:
http://en.wikipedia.org/wiki/Macro_%28computer_science%29#Lisp_.2F_S-expression_macros John
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