Physical sciences
notation: Q
type: Concept

Electrical engineering
notation: TK1-TK9971
type: Concept

Electronics
member: collection LCSH General
member: collection SubdivideGeographicalIndirect
member: collection LCSHAuthorizedHeadings
type: Concept
created: 1986-02-11T00:00:00
broader: Physical sciences
broader: Electrical engineering
modified: 2009-03-10T08:07:15
in scheme: lcsh
notation: TK7800-TK7895