--subdivision Energy consumption under military services, types of industries and topical headings, e.g. Agriculture--Energy consumption; Construction industry--Energy consumption; Dwellings--Energy consumption; and subdivision Fuel consumption under types of machinery, land vehicles, etc., e.g. Agricultural machinery--Fuel consumption; Automobiles--Fuel consumption
For works about first contact between specific groups, additional subject headings are assigned of the type [Ethnic group]--First contact with other peoples, e.g., 1. Europeans--First contact with other peoples; 2. Wyandot Indians--First contact with other peoples.
Contact lens industry -- Prices -- United States. / https://id.loc.gov/authorities/subjects/sh89004104 https://id.loc.gov/authorities/subjects/sh2002006518 https://id.loc.gov/authorities/names/n78095330-781 : United States.
Contact lenses -- Prices -- United States. / https://id.loc.gov/authorities/subjects/sh85031503 https://id.loc.gov/authorities/subjects/sh2002006518 https://id.loc.gov/authorities/names/n78095330-781 : United States.
Here are entered works on the conducting part of a relay, switch, circuit-breaker, connector, contactor, etc., which coacts with another conducting part to make or break a circuit. Works on devices for repeatedly establishing and interrupting an electric power circuit are entered under Electric contactors.