1. Levels of spectra and traffic, industrial and residential area noise;Bonvallet;JASA,1951
2. A method for investigating traffic noise in cities by using magnetons;Moll;Schalltechnik,1955
3. Roadside design to reduce traffic noise;Simonson;Highway Research Board Pub.,1956
4. Roadside design to reduce traffic noise;Simonson;Highway Research Board Pub.,1960
5. Vehicle noise legislation: A paradox of perplexities;Richards;Noise Control,1956