00274nam a2200109 a 450000500170000002000150001708200220003210000240005424500470007826000240012530000150014920251203091516.0  a3527260560  a541.3453,bD, ert  aErtl, G, J. Kuppers  aLow energy electrons and surface chemistry  aWeinheinbVCHc1985  a369p, 22cm