Sorting these covers by decade
Starship Troopers by decade
Robert A. Heinlein
29 covers from 30 printings with a known year, 2020s back to 1950s
2020s
3 covers · 2 of 3 printings say other · 3 publishers, Aleph and Mondadori among them · 2 languages
2010s
1 cover · 1 publisher, Ithaki Yayinlari
2000s
5 covers · 3 of 5 printings say other · 3 publishers, J'ai Lu and Ace Books among them · 2 languages
1990s
7 covers · 7 publishers, J'ai Lu and Ediciones B among them · 2 languages
1980s
5 covers · 2 of 7 printings say paperback · 7 publishers, Turtleback and Ace among them · 2 languages
1970s
3 covers · 3 publishers, NEL Books and Berkley among them
1960s
4 covers · 4 of 5 printings say paperback · 3 publishers, New American Library and Berkley Publishing Corporation among them
1950s
1 cover · 1 publisher, Gustav Lubbe Verlag GmbH
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.