Arcturus Children's Reference Library: Children's Encyclopedia of SpaceGiles SparrowVyprodánoPohlídat
Moles globosa, globus terrae und arenosus globus in Spätantike und MittelalterReinhard KrügerVyprodánoPohlídat
SpringerBriefs in History of Science and Technology: Historical Epistemology of SpaceMatthias SchemmelVyprodánoPohlídat
