00310nam a2200109Ia 4500008004000000082001600040100002800056245003700084260003300121300001300154650003300167210210b1977   xxu||||| |||| 00| 0 eng d  a530.02 GREP  aGRECHKO (L G) & others.  aProblems in theoretical physics.  aMoscowbMir Publishersc1977  aviii,447  aProblems theoretical physics