Let's try to get out of all the "superb", "fantastic", "thanks for sharing" ground level comments. There might be a bit more to say about that stunning piece of work coming from a very young man taking photos in the mid-1970s.
I know that one of Erik's main inspiration source is HCB's work, but, paradoxicallly enough, those make me rather think of Robert Frank's. Let's not forget the incredible Tony Ray-Jones, the comet of the British black and white social photography (1941-1972) but I don't know whether Erik knew him or not at that time. There are clearly some connections here. That would be interesting if Erik could tell us a bit more about how he saw the world around him back then, and what he was looking for when he was wandering all over Europe with his camera, and what was his educational and personal photographic mental background.
The photo of the two girls rolling themselves on the park grass is by far my absolute favorite of this series, for many reasons I would be happy to discuss with Erik in front of a cup of capuccino once and again at 't Smalle.