Here are entered general works on commodity exchanges. Works on exchanges dealing in a single commodity or class of commodities are entered under the specific commodity industry, e.g. Cotton trade; Grain trade; etc.
Here are entered general works on the amount of money that must be paid for commodities or services. --subdivision Prices under products, objects, etc., and under types of industries where one general subject heading for the products of that industry is lacking, e.g. Concrete--Prices; Construction industry--Prices
--subdivision Accidents under types of industries and under topics where phrase headings for accidents have not been established, e.g. Construction industry--Accidents; Theaters--Accidents; and subdivision Wounds and injuries under classes of persons, ethnic groups, and individual organs and regions of the body
