00357nam a2200157Ia 4500008004100000020001800041035001000059082001500069100001600084245003200100250000600132260003900138300000800177500000800185650000600193210723s9999||||xx |||||||||||||| ||und||  a0-521-27072-3  a28198  a301.2BELS  aElster, Jon 0aExplaining Technical Change  a-  aLondonbCambridge University Press  a273  a102  a-