00294nam a2200109Ia 450000500170000000800410001708200120005810000170007024500440008726000450013130000080017620260225050904.0260224s9999||||xx |||||||||||||| ||und||  a150 SPI  aE.H. Spicer  0aHuman problems in technological change   aNew York: John Wiley & Sons, Inc. c1952  a301