Dyfyniad APA

(1987). Sound propagation over uneven ground and irregular topography: Semiannual status report no. 4 / by Yves H. Berthelot [and others].

Dyfyniad Arddull Chicago

Sound Propagation over Uneven Ground and Irregular Topography: Semiannual Status Report No. 4 / by Yves H. Berthelot [and Others]. 1987.

Dyfyniad MLA

Sound Propagation over Uneven Ground and Irregular Topography: Semiannual Status Report No. 4 / by Yves H. Berthelot [and Others]. 1987.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.