Hi Letty -- You mean to buy it? I Googled it, putting the title in quotes and found a lot. Maybe it will help you. Looks like you can get a $45 first edition, a $5 edition from abebooks and several $1 editions from Amazon.
Mr.P says that William Stafford was one of the guest professors at the University of Washington when he was getting his degree in creative writing. Stafford was the Poetry Consultant for the Library of Congress from 1970 to 1971 and the post is now called Poet Laureate. Hmmm. Mr. P was in Viet Nam then, so it must have been after that.
Here are the first few results from Googling: "The Animal that Drank up Sound" Stafford --
Amazon.com: The Animal That Drank Up Sound: Books: William Stafford
Amazon.com: The Animal That Drank Up Sound: Books: William Stafford by William Stafford.
www.amazon.com/Animal-That-Drank-Up-Sound/dp/0152035648 - 97k - Cached - Similar pages
TomFolio.com: The Animal That Drank Up Sound, Stafford, William ...
The Animal That Drank Up Sound, Stafford, William and Frasier, Debra (Illustrator), Plum Books.
www.tomfolio.com/bookdetailsmem. asp?book=28695&mem=302 - 14k - Cached - Similar pages
TomFolio.com - William Stafford Biography and a list of his Books ...
William Stafford was born in Hutchinson, Kansas in 1914. He graduated from the University of Kansas in ... The Animal That Drank Up Sound (children's book). ...
www.tomfolio.com/AuthorInfo/authors/WilliamStafford.asp - 16k - Cached - Similar pages
0152035648: The Animal That Drank Up Sound - AbeBooks.com
The Animal That Drank Up Sound (ISBN: 0152035648) William Stafford. Bookseller: Wonder Book (Frederick, MD, U.S.A.), Price: US$ 4.99 [Convert Currency] ...
www.abebooks.com/ sm-search-0152035648-the-animal-that-drank-up-sound--is!0152035648.html - 22k - Cached - Similar pages