1. Code of practice for noise control on open sites. Part I. Basic information and procedures;British Standard BS 5228,1984
2. Acoustics—Noise emitted by machinery and equipment—Guidelines for the preparation of test codes of engineering grade requiring noise measurements at the operator position;Draft International Standard ISO/DIS 6081.2,1984
3. Code of practice for reducing the exposure of employed persons to noise;Department of Employment,1972