There may still be old airchecks of theirs lying around on tape cartridges. Cassette versions of these are available through Sparks Media, mentioned elsewhere in this file. Is Wrong 40 mins. Missing Yolk 60 mins. The Firesign Theatre's big book of plays.
Radio plays, American.
The other version has a yellow border, an old-time radio at the top of the page segues into a window at the bottom, through which a road runs. A guy is waving through the window at four guys on the other side, who are playing leap frog. The first printing makes reference to a hardbound edition. The Firesign Theatre's Big mystery joke book. Radio plays, American.