Aeronautics
type: Concept
notation: TL500-TL830
notation: HE9761-HE9900

Flying-machines
type: Concept
notation: TL670-TL724

Ground-effect machines
type: Concept

Helicopters
type: Concept
created: 2006-03-07T00:00:00
modified: 2006-05-11T12:38:53
alternative label: Copters
broader: Aeronautics
broader: Ground-effect machines
broader: Flying-machines
in scheme: lcsh
member: collection LCSH General
member: collection LCSHAuthorizedHeadings
member: collection SubdivideGeographicalIndirect
notation: TL716-TL716.9