The Cowsills In Books

Here's Johnny!: Thirty Years of Americas Favorite Late-Night Entertainer
by Stephen Cox
Cumberland House; Revised edition (August 15, 2002)

from Front Matter:
Johnny's Guests -
... Joe Cocker - Jean Marsh - David Brenner - Christie Brinkley - Garry Shandling - Chet Atkins - The Cowsills - Sheena Easton - B.B. King " The Oak Ridge Boys - Tim Conway - Bette Midler ...