Sorting these covers by decade
Bonjour tristesse by decade
Françoise Sagan
30 covers from 31 printings with a known year, 2020s back to 1950s
2020s
3 covers · 3 publishers, Julliard and Viena among them
2010s
3 covers · 2 of 4 printings say paperback · 4 publishers, Tusquets and Maxi-Tusquets among them
2000s
5 covers · 2 of 5 printings say paperback · 5 publishers, Quinteto and Harper Perennial Modern Classics among them · 3 languages
1990s
5 covers · 3 of 5 printings say paperback · 4 publishers, Julliard and TusQuets among them · 3 languages
1980s
2 covers · 2 publishers, Moewig Verlag and Presses Pocket among them
1970s
2 covers · 3 publishers, Penguin Books Ltd and Penguin among them
1960s
4 covers · 3 of 4 printings say paperback · 3 publishers, Manteau and Ullstein among them · 3 languages
1950s
6 covers · 5 publishers, Julliard and R. Julliard among them · 3 languages
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.