German authors 2 [vynechat] nemeckí spisovatelia 2 [vynechat] dejiny filozofie 1 [vynechat] dejiny objavov a vynálezov 1 [vynechat] discoveries and inventions 1 [vynechat] filozofi 1 [vynechat] history of discoveries and inventions 1 [vynechat] history of philosophy 1 [vynechat] inventors 1 [vynechat] objavitelia a vynálezcovia 1 [vynechat] objavy a vynálezy 1 [vynechat] philosophers 1 [vynechat]