--subdivision Supplementary employment under classes of persons and ethnic groups; and subdivision Officials and employees--Supplementary employment under names of countries, cities, etc., and under individual government departments, agencies, etc.
Here are entered works on families in which both husband and wife are pursuing careers and on how this affects their relationship and family life. Works on the conditions of employment of married people are entered under Married people--Employment.
Here are entered works on locomotives that run alternatively by an external electric power supply or by an onboard diesel engine as needed. Works on locomotives that employ an onboard diesel engine to generate electricity to turn the wheels, as well as locomotives whose diesel engines power the wheels through a gear box or through a hydraulic system are entered under Diesel locomotives.