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Springer
> Georg Helm
Georg Helm
title
ISBN-13
(ISBN-10)
year of publication
The Historical Development of Energetics
978-O-7923-5874-9
(O-7923-5874-O)
2000
Georg Ferdinand Helm
·
Georg Hüllen
·
George Hulme
·
Johann Georg Helm
Georg HelmsdÖRfer