Gunnar Källén Bücher

Finally, we thank Mr. Michael Teague for reading and commenting on the first dozen sections and we thank Mrs. Joanne Downs for ed iting and typing the final manuscript. ., IN MEMORIAM PROFESSOR GUNNAR KALLEN On October 13, 1968, Professor Gunnar Kallen of the University of Lund, Sweden, died in an airplane accident near Hanover.