http://dewey.info/scheme/a14/ en
621.4 Prime movers and heat engineering
621.47 Solar-energy engineering
621.47092 Solar engineers
http://dewey.info/scheme/a14/ vi
621.4 Động cơ chính và kỹ thuật nhiệt
621.47 Kỹ thuật năng lượng mặt trời
621.47092 Kỹ sư năng lượng mặt trời
http://dewey.info/scheme/a14/ it
621.4 Motori primi e ingegneria termica
621.47 Ingegneria dell'energia solare
621.47092 Ingegneri solari
http://dewey.info/scheme/edition/e23/ en
621.4 Prime movers and heat engineering
621.47 Solar-energy engineering
621.47092 Solar engineers 621.471 General topics of solar-energy engineering 621.472 Solar collectors 621.473 Solar engines 621.477 Solar furnaces
http://dewey.info/scheme/edition/e22/ de
621.4 Antriebsmotoren und Wärmetechnik
621.47 Solartechnik
621.47092 Solartechniker 621.471 Allgemeine Themen der Solartechnik 621.472 Sonnenkollektoren 621.473 Solarmotoren 621.477 Sonnenöfen
Dewey Decimal Classification
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