eHandS Health and Safety Management & Reporting Software, eHandS Health and Safety Glossary of Terms (online health and safety dictionary), Stirlingshire, UK 2009. http://www.ehands.co.uk/health-and-safety-glossary .html, (Hlth and Sfty Mgt - Brit) {51}
US Department of Transportation, Federal Aviation Administration, Reusable Launch and Reentry Vehicle System Safety Process, Advisory Circular AC No: 431.35-2A (Initiated by: AST-1 - July 20, 2005), Washington, DC,USA 2005. (Avn Sfty - Amer) {504}