: Some later series were eventually "indexed" (restricted or banned) by German regulatory bodies like the Bundesprüfstelle für jugendgefährdende Schriften due to concerns about the nature of the imagery involving minors.

Because the magazine is no longer in print, digital archives are the primary way to view back issues. Sonnenfreunde Magazine and newspaper catalogue - LastDodo

: Founded in the early 1950s by Richard Danehl’s Verlag in Hamburg, Germany, Sonnenfreunde was a pioneering "naturist newspaper" that documented the burgeoning FKK movement post-World War II.