620.9 1 [vynechat] 621.1 1 [vynechat] 621.22 1 [vynechat] 621.3 1 [vynechat] 621.548 1 [vynechat] 621.621 1 [vynechat] akustika 1 [vynechat] biochemici 1 [vynechat] biochemists 1 [vynechat] dejiny vedy 1 [vynechat] dejiny školstva 1 [vynechat] elektrotechnika 1 [vynechat] energetika 1 [vynechat] fyzika 1 [vynechat] historiografia 1 [vynechat] historiography 1 [vynechat] history of education 1 [vynechat] history of science 1 [vynechat] konštrukcie dopravných prostriedkov 1 [vynechat] koža (materiál) 1 [vynechat] kožušina 1 [vynechat] lode 1 [vynechat] mechanika 1 [vynechat] objavitelia a vynálezcovia 1 [vynechat] priemyselné technológie 1 [vynechat] shipping 1 [vynechat] ships 1 [vynechat] technici 1 [vynechat] technická fyzika 1 [vynechat] termika 1 [vynechat]