@book {TN_libero_mab2,
author = { Oravas, Gunhard Ae },
title = { Lectures on the history of technology and engineering 1 },
publisher = {Olms},
isbn = {3487117444},
year = {2004},
address = { Hildesheim },
url = { http://slubdd.de/katalog?TN_libero_mab2 }
}
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