00394nam a2200133Ia 450000500170000000800410001708200150005810000220007324500460009525000120014126000450015350400350019865000270023320240911061113.0190321s9999    xx            000 0 und d  a620.1bHAR  aHartog, J. P. Den 0aMechanical vibrations /cJ. P. Den Hartog  a4th ed.  aNew York :bMcGraw-Hill Companies,c1956  aIncludes references and index.  aMechanical engineering