Calculations of day-night levels (Ldn) resulting from civil aircraft operations.

Bibliographic Details
Corporate Authors:	United States. Office of Noise Abatement and Control, Bolt, Beranek, and Newman
Format:	Government Document Book
Language:	English
Published:	[Wsahington] : Environmental Protection Agency, Office of Noise Abatement and Control, 1977. [date of publication not identified]
Series:	EPA ; 550/9-77-450
Subjects:	Airplanes > Noise > Handbooks, manuals, etc. Aeronautics, Commercial > Statistics > Handbooks, manuals, etc.

Description
Item Description:	Prepared by Bolt Beranek & Newman, Inc. under contract number 68-01-3218. Includes appendices and index. "Calculation of day-night levels (Ldn) resulting from civil aircraft operations"--Cover title.
Physical Description:	vii, 370 pages : illustrations, graphs ; 28 cm.
Bibliography:	Bibliography: page 71.