Sound propagation over uneven ground and irregular topography
Subtitle: semiannual status report no. 4
By: by Yves H. Berthelot ... [et al.]
Contributors: Berthelot, Yves Henri; United States. National Aeronautics and Space Administration
Series: NASA contractor report -- NASA CR-180644
Publisher: National Aeronautics and Space Administration; National Technical Information Service, distributor
Published: 1987
Place of publication: [Washington, DC; Springfield, Va
Language: eng
Format: Microform
Notes: Distributed to depository libraries in microfiche

Microfiche. [Washington, D.C. : National Aeronautics and Space Administration, 1987] 1 microfiche