Short answers, pulled from the story.
The 1979 NPR Lord of the Rings radio dramatization is a broadcast adaptation of J.R.R. Tolkien's novel, produced by Bob Lewis and written for radio by Bernard Mayes. It ran to more than eleven hours and came from The Mind's Eye production company.
The 1979 Lord of the Rings radio series includes Tom Bombadil because Bernard Mayes, who wrote the adaptation, chose to keep those scenes unlike most other adapters. Mayes also voiced Tom Bombadil himself in the production.
Bernard Mayes voiced Gandalf in the 1979 Lord of the Rings radio series. Mayes was also the writer who adapted the novel for radio and voiced Tom Bombadil in the same production.
The 1979 NPR Lord of the Rings cast included fourteen named actors. Many played multiple characters; Gail Chugg and John Vickery each voiced four separate roles.
Newer editions of the 1979 Lord of the Rings radio series on compact disc and MP3 have a somewhat shorter running time than the original cassette recordings. A considerable amount of dialogue and narration was omitted or condensed in those later formats.
The most widely circulated American edition of the 1979 Lord of the Rings radio series comes in a wooden box, available on either compact disc or cassette tape.