https://en.wikipedia.org/wiki/Dutch_comics#Pep_magazine
It was Pep in particular that turned out to be an emancipating force for the Dutch comic world, freeing it from the shackles of 1948 while
coachingcoasting on the winds of the social and cultural changes that not only swept the Netherlands, but the entire western world in the 1960s. From the mid-1960s onward, the magazine reinvented itself when it quite radically distanced itself from its Disney and Le Lombard roots... --WP
(right-click as needed)
My own summary: Pep was a significant comics magazine, published in Holland / The Netherlands, that introduced Euro-Disney and BD comics to the nation, and later paved the way for homegrown talent to get their works published to a wider audience. From roughly that point, various Dutch comics began to be a real force around the rest of Europe, with such titles as Suske en Wiske, Agent 327, Storm, Douwe Dabbert, and the amazing Franka leading the way...
For more history, WP's article on Dutch comics is particularly excellent & exhaustive:
https://en.wikipedia.org/wiki/Dutch_comics
For those who can't see the four images hosted in post, here they are at Imgur:
https://imgur.com/gallery/four-covers-from-pep-magazine-9EBc1KA
