These photos form (part of) the "photo archive" of the magazine's editors.
The photos were loose in hanging folders that had been placed in stacks, next to the stacks of hanging folders there were also many loose photos. When going through the suspension files, it also turned out that many photos had been stored incorrectly. An attempt was made to restore the old order as much as possible. Unfortunately, forming a category of remnants could not be avoided.
The F number is the inventory number, under this number the photographs should be requested. The number under the description is the number of the hanging folder in which the photograph was originally stored. Finally, the month and year of publication are given, as far as they could be determined from notes on the back of the photograph. The indication z.d. stands for "without date".