00505nam a2200181Ia 4500003000900000008004100009020001600050040001600066080001700082100001700099245007700116260002600193300001400219650001900233650002700252650002800279650001600307IN-BaIIA211028s9999    xx            000 0 eng d  a471-81300-1  cIIA Library  a621.383bSOM  aSommer, A. H 0aPhotoemissive materialsbpreparation, properties and usescA. H. Sommer   aNew YorkbWileyc1968  aix, 256p.  aNASA thesaurus  aPhotoelectric emission  aPhotographic processing  aPhotography