https://archive.org/details/frauen-und-manner-der-steinzeit-arte
https://archive.org/details/warum-nahtoderfahrungen-nicht-im-gehirn-entstehen-biologe-dr.-michael-nahm
https://archive.org/details/der-tagliche-stoiker-nachdenkliche-betrachtungen-uber-weisheit-und-lebensstil
https://archive.org/details/abstieg-in-eine-parallelwelt-unter-der-erde-wdr
https://archive.org/details/a.-k.-turner-tote-schweigen-nie-1
https://archive.org/details/a.-k.-turner-tote-schweigen-nie-2