: If "Sonnenfreunde" is a publication with an official website, they might have an archive or a section for special issues where you can find what you're looking for.

Classified in some regions (like Australia) as historical publications, these magazines are viewed as artifacts of a specific social movement rather than just entertainment.

* Books, Movies & Music / * Books / * Zines & Magazines / * Magazines. Sonnenfreunde Zeitschriften- und Zeitungskatalog - LastDodo 18+ * 1958. * 100. www.lastdodo.de Sonnenfreunde Zeitschriften- und Zeitungskatalog - LastDodo 18+ * 1958. * 107. www.lastdodo.de Sonnenfreunde Nr. 1 Januar 1993 - Internet Archive

The "Sonderheft" (Special Issues) are distinct from the regular monthly or quarterly magazines. These were typically published annually (often yearbooks) or as thematic compilations.