By van der Spuy Sybrand J.   von Backström Theodor W.   Kröger Detlev G.   in Noise Control Engineering Journal

ISSN:0736-2501|57|4|341-347

Institute of Noise Control Engineering‎(2009)‎

Access to resources Favorite 13.291742

By Gauché Paul   Brent Alan C   von Backström Theodor W   in Development Southern Africa

ISSN:1470-3637|31|5|692-710

Routledge Ltd‎(2014)‎

Access to resources Favorite 3.9993856