Aeronautics--Study and teaching
type: Concept
created: 1986-02-11T00:00:00
modified: 2007-01-20T07:54:29
in scheme: lcsh
member: collection SubdivideGeographicalIndirect
member: collection LCSHAuthorizedHeadings
member: collection LCSH General
notation: TL560-TL560.4
top concept of: lcsh