Quantum field theory / by H. Umezawa. Umezawa, H. (Hiroomi), Quantum theory. 530.12 UMQ Includes index. Includes bibliographies and indexes. Amsterdam : North-Holland Pub. Co. ; New York : Sole agency for U. S. A., Interscience Publishers, c1956. c1956. 1956 Text x, 364 p. ; eng Series in physics Series in physics.