--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.
Here are entered works on the school of thought that studies the transmission of ideas by viewing them as being contagious living organisms called memes.
