http://dewey.info/scheme/a14/ en
537 Electricity and electronics
537.5 Electronics
http://dewey.info/scheme/a14/ vi
537 Điện học và điện tử học
537.5 Điện tử học
http://dewey.info/scheme/a14/ it
537 Elettricità ed elettronica
537.5 Elettronica
http://dewey.info/scheme/edition/e23/ en
537 Electricity and electronics
537.5 Electronics
537.52 Disruptive discharges 537.53 Discharge through rarefied gases and vacuums 537.54 Photoelectric phenomena 537.56 Electron and ion optics
http://dewey.info/scheme/edition/e22/ de
537 Elektrizität und Elektronik
537.5 Elektronik
537.52 Durchschlagentladungen 537.53 Entladung durch verdünnte Gase und Vakuen 537.54 Photoelektrische Phänomene 537.56 Elektronen- und Ionenoptik
Dewey Decimal Classification
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