00471mas a22001091  4500008004100000245009000041260004000131300001900171500012200190650002600312700002300338880509d19611963nyuuu         0    0eng d00aLectures in theoretical physics.cEdited by Wesley E., B. W . Downs and Joanne Downs.  aNew York,bInterscience Publishers.  a[625 p.]bill.  aVolume IV lectures delivered at the summer institute for theoretical physics, University of Colorado, Boulder, 1961.. 0aMathematical physics.  aBrittin, Wesley E.