IBID
Set to 14 different clues across 34 published puzzles, most often “Footnote abbr.” — The New York Times, Tuesday, 17 August 2010.
4 letters
Every clue on record, most used first
- Footnote abbr.19 times
The New York Times — Tuesday, 17 August 2010
- Footnote note3 times
The New York Times — Thursday, 22 October 1998
- Sourcing abbr.once
The New York Times — Saturday, 21 May 2011
- Bibliog. equivalent of "ditto"once
The New York Times — Friday, 24 July 2009
- Abbr. after an author's name, maybeonce
The New York Times — Friday, 17 August 2007
- Bibliographical abbr.once
The New York Times — Thursday, 23 March 2006
- Bridge wordsonce
The New York Times — Friday, 13 August 2004
- Bibliographic abbr.once
The New York Times — Wednesday, 17 December 2003
- Referential abbr.once
The New York Times — Saturday, 1 February 2003
- Term paper abbr.once
The New York Times — Wednesday, 15 May 2002
- Start of a bridge declarationonce
The New York Times — Sunday, 7 February 1999
- Kin of op. cit.once
The New York Times — Wednesday, 25 February 1998