Preferred term
TK7871.72-TK7871.79 Vacuum-tubes
Broader concept
Broader conceptGroup members
Members of the groupNotation
Code that uniquely identifies a concept within a concept scheme.- TK6565.V3
- TK7871.72-TK7871.79
- TP159.V3
URI
http://www.yso.fi/onto/lcsh/sh85141746