--subdivision Health and hygiene under occupational groups, e.g. Printers--Health and hygiene; also subdivision Employees--Health and hygiene under types of industries, e.g. Construction industry--Employees--Health and hygiene; and subdivision Health aspects under types of industries, structures, and processes, e.g. Construction industry--Health aspects; Welding--Health aspects
--subdivisions Supply and demand under occupational groups and types of employees and Employees--Supply and demand under types of industries, e.g. Construction industry--Employees--Supply and demand
