This oversized postcard advertises The Julie Andrews Collection of books for ages 3-7.
Dumpy and the Firefighters
Dumpy's Happy Holiday
(not shone, but on back are Dumpy's Apple shop and Dumpy to the Rescue)
the back has the price of the books in Hard Cover, Library Binding and Paperback with prices ranging from $3.99 (2 Dumpy's books PB) to $25.99 (Grateful, HC)