00952nam a2200289 i 450099100101896970753620020507105211.0970307s1973 us ||| | eng 012200650Xb10162227-39ule_instLE00640832ExLDip.to Fisicaita53.2.8253.2.84537.5'6QC447.D34Dahl, Poul26971Introduction to electron and ion optics /Poul DahlNew York :Academic Press, Inc.,1973vii, 147 p. :ill. ;24 cm.Electron beams.b1016222721-09-0627-06-02991001018969707536LE006 53.2.8 DAH12006000046640le006-E0.00-l- 00000.i1019659627-06-02Introduction to electron and ion optics188674UNISALENTOle00601-01-97ma -engus 01