ABO
Set to 18 different clues across 30 published puzzles, most often “Blood-typing system” — The New York Times, Sunday, 7 August 2011.
3 letters
Every clue on record, most used first
- Blood-typing system5 times
The New York Times — Sunday, 7 August 2011
- Blood-typing letters5 times
The New York Times — Wednesday, 1 June 2011
- Blood letters3 times
The New York Times — Friday, 17 September 2004
- Blood type letters2 times
The New York Times — Wednesday, 18 May 2011
- Typing letters?2 times
The New York Times — Saturday, 6 June 2009
- ___ system (way of classifying blood)once
The New York Times — Sunday, 30 January 2011
- Blood-typing syst.once
The New York Times — Wednesday, 29 September 2010
- Blood type syst.once
The New York Times — Wednesday, 18 October 2006
- Typing systemonce
The New York Times — Saturday, 31 December 2005
- Blood classificationonce
The New York Times — Sunday, 27 November 2005
- Blood typing systemonce
The New York Times — Wednesday, 23 November 2005
- Blood-type lettersonce
The New York Times — Thursday, 6 October 2005