Here are entered works on plates as engineering structures. Works on shells as engineering structures are entered under Shells (Engineering). Works on the mathematical theories of elasticity in plates and shells are entered under Elastic plates and shells.
Here are entered works on all types of media used for the recording of sound including cylinders, analog discs, digital discs, films, tapes, and wires, as well as works about analog discs alone.
--subdivision Dismissal of under occupational groups and types of employees; and subdivision Officials and employees--Dismissal of under names of countries, cities, etc., and under individual government departments, agencies, etc.
