00693nam a2200217Ia 4500003000900000008004100009020001600050040001600066080001700082100002300099245007700122260002600199300001400225650001900239650003300258650002800291650001600319942000700335999001500342952011800357IN-BaIIA211028s9999 xx 000 0 eng d a471-81300-1 cIIA Library a621.383bSOM aSommer, A. H93208 0aPhotoemissive materialsbpreparation, properties and usescA. H. Sommer  aNew YorkbWileyc1968 aix, 256p. aNASA thesaurus aPhotoelectric emission92888 aPhotographic processing aPhotography cBK c3353d3353 00104070aBANbBANcGENd1969-12-24g93.24l0o621.383/ SOMp3728r2021-11-05v93.24w1969-12-24yBKGRs. 93.24