--subdivision Audio-visual aids under subjects; and subdivision Study and teaching--Audio-visual aids under subjects for the use of audio-visual aids in the learning and teaching of those subjects, e.g. Geography--Study and teaching--Audio-visual aids
Audiographic music rolls -- See Player piano rolls Here are entered the perforated rolls intended for use on player pianos and works about such rolls. Musical compositions for player piano are entered under Player piano music.
Audiology Instruments -- See Also Hearing aids Here are entered works on devices to improve hearing ability. Works on synthetic replicas of the ear used to restore cosmetic harmony to the face are entered under Ear prostheses.
--subdivision Audio-visual aids under subjects; and subdivision Study and teaching--Audio-visual aids under subjects for the use of audio-visual aids in the learning and teaching of those subjects, e.g. Geography--Study and teaching--Audio-visual aids
--subdivision Audio-visual aids under subjects; and subdivision Study and teaching--Audio-visual aids under subjects for the use of audio-visual aids in the learning and teaching of those subjects, e.g. Geography--Study and teaching--Audio-visual aids
Auditing, Tax -- See Tax auditing Here are entered works on the audit and investigation of tax returns. Works on accounting practices necessary to prepare tax returns are entered under Tax accounting.
