00323nam a2200109Ia 4500008004100000020001800041082001700059100002500076245005400101260004500155300001300200191014s9999    xx            000 0 und d  a981-256-847-6  a530.143bDAS  aAshok Das, Rochester 0aField Theory A Path Integral Approach 2nd Edition  aPakistanbNational Books Fundationc2006  aXiv,6361