%0 Journal Article %A Turner, J. E. %T Fields and/or Particles, by D. K. Sen. x+139 pages. Ryerson Press, Toronto; Academic Press, London, 1968. 50s. %J Canadian mathematical bulletin %D 1972 %P 315-316 %V 15 %N 2 %U http://geodesic.mathdoc.fr/articles/10.1017/S000843950003157X/ %R 10.1017/S000843950003157X %F 10_1017_S000843950003157X