00949nam a2200277 i 450099100104258970753620020507105553.0970307s1969 us ||| | eng b10165411-39ule_instLE00641171ExLDip.to Fisicaita53.3.13253.3.134530.14'3QC721Gourdin, H.462607Lagrangian formalism and symmetry laws /H. GourdinNew York :Gordon and Breach Science Publishers,1969viii, 100 p. :ill. ;24 cm.Quantum field theory.b1016541121-09-0627-06-02991001042589707536LE006 53.3.13 GOU12006000075640le006-E0.00-l- 00000.i1020168327-06-02Lagrangian formalism and symmetry laws188066UNISALENTOle00601-01-97ma -engus 01