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15. Aachener Tagung Wassertechnologie. Verfahren der Abwasserbehandlung und Wasseraufbereitung
T. Wintgens
The Engineer'S Sketch-Book; Of Mechanical Movements, Devices, Appliances, Contrivances And Details Employed In The Design And Construction Of Machinery For Every Purpose Classified & Arranged For Reference For The Use Of Engineers, Mechanical Draughtsmen,
Thomas Walter Barber
