Wentzel, Gregor, 1898- Quantum theory of fields / by Gregor Wentzel. - New York, Interscience Publishers, 1949. - ix, 224 p. 24 cm. Translation of Einführung in die Quantentheorie der Wellenfelder. Subjects--Topical Terms: TEORÍA CUÁNTICA Universal Decimal Class. No.: 539.1