00341nam a2200121Ia 4500008004100000041000800041082001600049100001900065245005900084260004500143300002400188365000700212240624s9999    xx            000 0 und d  aeng  a621.803 HAR  aHARPER COLLINS  aHOW THINGS WORK THE UNIVERSAL ENCYCLOPEDIA OF MACHINE   c2005aNew DelhibHarpercollins Publisher  a590 : p. : cm. ; 20  cRS