The Klass Files, by journalist and UFO researcher Philip Klass. Download the full collection (PDFs, ~40 MB) or browse individual volumes.
Volume 76
by Philip J. Klass
July 1, 2003
Volume 75
by Philip J. Klass
April 1, 2003
Volume 74
by Philip J. Klass
January 1, 2003
Volume 73
by Philip J. Klass
October 1, 2002
Volume 72
by Philip J. Klass
July 1, 2002
Volume 71
by Philip J. Klass
April 1, 2002
Volume 70
by Philip J. Klass
January 1, 2002
Volume 69
by Philip J. Klass
October 1, 2001
Volume 68
by Philip J. Klass
July 1, 2001
Volume 67
by Philip J. Klass
March 1, 2001
Volume 66
by Philip J. Klass
November 1, 2000
Volume 65
by Philip J. Klass
September 1, 2000
Volume 64
by Philip J. Klass
July 1, 2000
Volume 63
by Philip J. Klass
May 1, 2000
Volume 62
by Philip J. Klass
March 1, 2000
Volume 61
by Philip J. Klass
January 1, 2000
Volume 60
by Philip J. Klass
November 1, 1999
Volume 59
by Philip J. Klass
September 1, 1999
Volume 58
by Philip J. Klass
July 1, 1999
Volume 57
by Philip J. Klass
May 1, 1999
Volume 56
by Philip J. Klass
March 1, 1999
Volume 55
by Philip J. Klass
January 1, 1999
Volume 54
by Philip J. Klass
November 1, 1998
Volume 53
by Philip J. Klass
September 1, 1998
Volume 52
by Philip J. Klass
July 1, 1998
Volume 51
by Philip J. Klass
May 1, 1998
Volume 50
by Philip J. Klass
March 1, 1998
Volume 49
by Philip J. Klass
January 1, 1998
Volume 48
by Philip J. Klass
November 1, 1997
Volume 47
by Philip J. Klass
September 1, 1997
Volume 46
by Philip J. Klass
July 1, 1997
Volume 45
by Philip J. Klass
May 1, 1997
Volume 44
by Philip J. Klass
March 1, 1997
Volume 43
by Philip J. Klass
January 1, 1997
Volume 42
by Philip J. Klass
November 1, 1996
Volume 41
by Philip J. Klass
September 1, 1996
Volume 40
by Philip J. Klass
July 1, 1996
Volume 39
by Philip J. Klass
May 1, 1996
Volume 38
by Philip J. Klass
March 1, 1996
Volume 37
by Philip J. Klass
January 1, 1996
Volume 36
by Philip J. Klass
November 1, 1995
Volume 35
by Philip J. Klass
September 1, 1995
Volume 34
by Philip J. Klass
July 1, 1995
Volume 33
by Philip J. Klass
May 1, 1995
Volume 32
by Philip J. Klass
March 1, 1995
Volume 31
by Philip J. Klass
January 1, 1995
Volume 30
by Philip J. Klass
November 1, 1994
Volume 29
by Philip J. Klass
September 1, 1994
Volume 28
by Philip J. Klass
July 1, 1994
Volume 27
by Philip J. Klass
May 1, 1994
Volume 26
by Philip J. Klass
March 1, 1994
Volume 25
by Philip J. Klass
January 1, 1994
Volume 24
by Philip J. Klass
November 1, 1993
Volume 23
by Philip J. Klass
September 1, 1993
Volume 22
by Philip J. Klass
July 1, 1993
Volume 21
by Philip J. Klass
May 1, 1993
Volume 20
by Philip J. Klass
March 1, 1993
Volume 19
by Philip J. Klass
January 1, 1993
Volume 18
by Philip J. Klass
November 1, 1992
Volume 17
by Philip J. Klass
September 1, 1992
Volume 16
by Philip J. Klass
July 1, 1992
Volume 15
by Philip J. Klass
May 1, 1992
Volume 14
by Philip J. Klass
March 1, 1992
Volume 13
by Philip J. Klass
January 1, 1992
Volume 12
by Philip J. Klass
November 1, 1991
Volume 11
by Philip J. Klass
September 1, 1991
Volume 10
by Philip J. Klass
July 1, 1991
Volume 9
by Philip J. Klass
May 1, 1991
Volume 8
by Philip J. Klass
March 1, 1991
Volume 7
by Philip J. Klass
January 1, 1991
Volume 6
by Philip J. Klass
November 1, 1990
Volume 5
by Philip J. Klass
September 1, 1990
Volume 4
by Philip J. Klass
July 1, 1990
Volume 3
by Philip J. Klass
May 1, 1990
Volume 2
by Philip J. Klass
March 1, 1990
Volume 1
by Philip J. Klass
December 1, 1989