Hi, AvaJoy ~

I tried searching for the book...
Here's all I could find (from a college Prof's
1994 thesis at Carnegie Mellon University):

"Quack! Said Jerusha" written by Mildred Plew Merryman

Mildred Plew Merryman = Author's full name

"Children's Stories" = title of Book

chapter "Quack! said Jerusha", pages 117­136.
Indicates "Quack! said Jerusha" was a CHAPTER in the BOOK "Children's Stories".

Whitman Publishing Co., Racine, WI, 1950 = the Publisher

There are several search hits on the Chapter title and the author, and dozens of hits on the publisher ~
BUT most of the hits lead to an article or web site WANTING a copy of the book! No web site I visited HAD a copy of the book.

You might try eBay - the auction site. (I didn't)

Good luck!