Historical clue formulations

• Loc. ___ (footnote abbr.) — 2025-12-25
• Footnote abbr. — 2025-02-28
• Loc. ___ (footnote abbr.) — 2023-10-28
• Loc. ___ — 2022-01-08
• Op. ___ (footnote abbr.) — 2021-12-05
• Op. ___ — 2021-11-07
• Op. ___ (footnote abbr.) — 2021-10-24
• Op. ___ — 2015-02-18
• Op. ___ (footnote phrase) — 2013-09-22
• Abbr. following op. and loc. — 2011-04-10
• Op. ___ — 2008-12-14
• Summons: Abbr. — 2008-04-26
• Op. ___ (footnote abbr.) — 2006-06-05
• Part of a footnote abbr. — 2004-07-17
• Loc. ___ — 2002-02-08
• Summons: Abbr. — 2001-06-22
• Op. ___ (footnote abbr.) — 2001-04-03
• Loc. ___ — 2001-02-11
• Op. ___ — 2000-09-17
• Op. ___ — 2000-07-09
• Summons: Abbr. — 2000-04-02
• Op. ___ — 2000-03-23
• Op. ___ — 1999-12-06
• Op. ___ (footnote abbr.) — 1999-06-01
• Native: Abbr. — 1998-10-24
• Op. ___ — 1998-05-03
• Op. ___ — 1998-04-02
• Part of a footnote abbr. — 1997-12-07
• Op. ___ — 1996-11-14
• Op. ____ (footnote abbr.) — 1995-12-25
• Part of a footnote abbr. — 1994-03-23