00350nam a2200133Ia 4500008004000000020001800040082001300058100002200071245004100093260004600134300000800180440000600188650002200194210210b1979   xxu||||| |||| 00| 0 eng d  a0 586 08173 9  a603 HOWT  aHOW Things work 2  aUniversal encyclopaedia of machines.  aHerts.bGranada Publishing Limited,c1979  a590  a2  aHow Things Work