TY  - BOOK
AU  - Den Hartong,J.P.
TI  - Mechanical vibrations 
T2  - Dover books on engineering
SN  - 9780486647852
U1  - 620.3 
PY  - 1985///
CY  - New York
PB  - Dover Publications
KW  - Mechanical Vibrations
N1  - Includes index
ER  -