Page:Library of Congress Classification Outline.djvu/303

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Subclass UG

UG1-620 Military engineering
UG160-302   Tactics and regulations
UG335 Bridges
UG340 Tunnels
UG360-390 Field engineering
UG400-442 Fortification
UG443-449 Attack and defense. Siege warfare
UG470-474 Military surveying, topography, and mapping
UG490 Land mines, etc.
UG500-565 Technical troops and other special corps
UG570-582 Military signaling
UG590-613.5 Military telegraphy and telephony
UG614-614.5 Military electric lighting
UUG615-620 Military motor vehicles
UG622-1435 Air forces. Air warfare
UG633-635 By region or country
UG637-639 Education and training
UG640-645 Military aeronautical research
UG700-705 Tactics
UG730-735 Air defenses
UG760-765 Aerial reconnaissance
UG770-1045 Organization. Personnel management
UG1097 Air bases
UG1100-1435 Equipment and supplies
UG1500-1530 Military astronautics. Space warfare. Space surveillance
UG1523-1525 By region or country