00966nam a2200289 i 450099100114478970753620020507111853.0970308s1968 us ||| | eng b10179884-39ule_instLE00642888ExLDip.to Fisicaita53.8.2453.8.27621.381'54TK8304Sommer, A.H.463249Photoemissive materials :preparation, properties and uses /A.H. SommerNew York :John Wiley & Sons,1968ix, 256 p. :ill. ;23 cm.ElectronicsOptoelectronic devices.b1017988421-09-0627-06-02991001144789707536LE006 53.8.2 SOM12006000161763le006-E0.00-l- 02020.i1022069027-06-02Photoemissive materials189033UNISALENTOle00601-01-97ma -engus 01