14th: 12/28/48-12/30/48
Chicago, IL

15th: 12/27/49-12/29/48
New York, NY

16th: 12/27/50-12/29/50
Washington, D.C.

17th: 12/27/51-12/29/51
Rochester, New York

18th: 12/27/52-12/29/52
New Haven, CT

19th: 12/28/53-12/30/53
Chapel Hill, NC

20th: 12/27/54-12/29/54
Ann Arbor, Michigan

21st.: 12/28/55-12/30/55
Princeton, NJ

22nd: 12/28/53-12/30/56
Chicago, IL

23rd: 12/28/57-12/30/57
Los Angeles, CA

24th: 12/27/58-12/30/58
Boston, MA

25^th: 12/27/59-12/30/59
Chicago, IL

26th: 12/27/60-12/30/60
Berkeley, CA

27th: 9/05/61-9/11/61
New York, NY

28th: 12/27/62-12/30/62
Columbus, OH

29th: 12/27/63-12/30/63
Seattle, WA

30th: 12/27/64-12/30/64
Washington, D.C.

39th: 11/08/73-11/11/73
Chicago, IL

40th: 10/31/74-11/03/74
Washington, DC

41st: 10/30/75-11/02/75
Los Angeles, CA

42nd: 11/04/76-11/07/76
Phila., PA [Washington DC]

43rd: 8/77 (with IMS)
Berkeley, Calif.

44th: 10/19/78-10/22/78
Minneapolis, MN

45th: 11/01/79-11/04/79
New York, NY

46th: 11/06/80-11/09/80
Denver, CO

47th: 11/12/81-11/15/81
Boston, MA

48th: 11/04/82-11/07/82
Ann Arbor, MI

49th: 10/27/83-10/30/83
Louisville, KY

50th: 10/25/84-10/28/84
Phila., PA

51st: 11/07/85-11/10/85
Vancouver, Canada

52nd: 11/06/86-11/09/86
Cleveland, OH

53rd: 10/15/87-10/18/87
New Orleans, LA

54th: 11/03/88-11/06/88
Baltimore, MD

55th: 10/26/89-10/29/89
Hyatt Regency
Austin, TX

56th: 11/07/90-11/10/90
Oakland, CA

57th: 11/06/91-11/10/91
Palmer House
Chicago, IL

58th: 11/05/92-11/08/92
Hyatt Regency
Pittsburgh, PA

59th: 11/04-11/07/93
Queen Elizabeth
Montreal, Canada

60th: 10/27/94-10/30/94
Hyatt Regency
Minneapolis, MN

61st: 11/02/95-11/05/95
Grand Hyatt
New York, NY

62nd: 11/07/96-11/10/96
Omni
Baltimore, MD

63rd: 10/30/97-11/02/97
Hyatt Regency
Phoenix, AZ

68^th: 10/31/02-11/3/02
Hyatt Regency
Columbus, Ohio (abstracts)

70^th: 11/11/04-11/14/04
Sheraton
Seattle, Washington (abstracts)