Applied AcousticsAn International Journal. Co-ordinating Editor Peter Lord. Vol. 1, No. 1. January 1968. 79 pp. 16 × 24 cm. Elsevier Publishing Co. Annual subscription £7. 10s Get access D. E. Hickish D. E. Hickish Search for other works by this author on: Oxford Academic PubMed Google Scholar The Annals of Occupational Hygiene, Volume 11, Issue 3, July 1968, Page 269, https://doi.org/10.1093/annhyg/11.3.269 Published: 01 July 1968