00291nam a22001097a 4500003000600000005001600006008004100022245007100063260002500134300001000159650001200169MWNLS2010112506216.0101126t        xxu||||| |||| 00| 0 eng d  aElementary, economic experiments in physics/cby Reinald F. Melton  aLondon:bCEDO,c1972  a51 p.  aphysics