en
62
Engineering
623
Military and nautical engineering
623.0155
Military geophysics
623.04
Special topics of military engineering
623.092
Military engineers
623.1
Fortifications
623.2
Mine laying and clearance, demolition
623.3
Engineering of defense
623.4
Ordnance
623.5
Ballistics and gunnery
623.6
Military transportation technology
623.7
Communications, vehicles, sanitation, related topics
623.8
Nautical engineering and seamanship
Dewey Decimal Classification
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