Three great mystery stories /
Blyton, Enid.
Blyton, Enid.Rubadub mystery.
Blyton, Enid.Rat-a-tat mystery.
Blyton, Enid.Ragamuffin mystery.
London : Armada,
1992.
Cover title.
"An Armada three-in-one."
Contents: The rubadub mystery -- The rat-a-tat mystery -- The ragamuffin mystery.