The (Friends of the Sun) series was primarily published by Sonnenfreunde-Verlag in Hamburg.
: Some older issues have been digitized for historical preservation. You can occasionally find them on community-driven archives like Archive.org , which hosts various German naturist periodicals. sonnenfreunde sonderheft magazine 23 link
Because these are vintage publications, "links" typically refer to either digital archives or listings on collector marketplaces. The (Friends of the Sun) series was primarily
: The magazine focused on the philosophy of naturism, sunbathing, and "free body culture," often featuring photography of outdoor activities and family-oriented nudism. and "free body culture
: Be cautious with blog links or "click here to download" buttons found on unofficial sites; these are frequently used for data collection or malware. Magazine Background