Here are entered works on the hours that employees are at work. Works on the number of hours of labor necessary to accomplish a task are entered under Labor time. Works on the units produced by workers in relation to a given effort or unit of time expended are entered under Labor productivity.
Here are entered general works on city children and works limited to city children of regions, countries, states, etc. Works on children of individual cities, city regions or metropolitan areas are entered under the heading Children with local subdivision.