John Krol

Telecommunications Systems & Services Directory

1989

Telecommunications Directory 1997 (Telecommunications Directory)

1996

Telecommunications Directory 1995-96 (Telecommunications Directory)

1994

Telecommunications Directory, 1994-95

1993

Telecommunications Directory, 1992-93

1991

Older Americans Information Directory

1994

Newsletters in Print

1992

Newsletters in Print 1994-95 (Newsletters in Print)

1994

Information Industry Directory

1998

Gale Directory of Broadcast Media and Personnel

1989