Sorting these covers by decade
The Cat in the Hat by decade
Dr. Seuss
26 covers from 34 printings with a known year, 2000s back to 1950s
2000s
11 covers · 5 of 14 printings say paperback · 10 publishers, Collins and Random House Books for Young Readers among them · 4 languages
1990s
7 covers · 3 of 7 printings say hardcover · 7 publishers, Twentieth Century-Fox Home Video and Yuan liu chu ban shi ye gu fen you xian gong si among them · 3 languages
1980s
2 covers · 2 publishers, Random House Books for Young Readers and HarperCollins among them
1960s
1 cover · 1 publisher, Random House Books for Young Readers
1950s
5 covers · 6 publishers, Random House and Random House Books for Young Readers among them
Covers from Open Library, each in the decade of the earliest printing that carries it. What the catalogues never scanned is missing here too. See the whole wall.