7.9. ΦΟΡΕΙΣ ΠΛΗΡΟΦΟΡΗΣΗΣ
http://www.nssga.org/index.shtml
The Largest Mining Association In the World
The Asphalt Pavement Association is a California non-profit trade association composed of Hot Mix Asphalt Producers, Asphalt Refiners, Asphalt Paving Contractors and Affiliated companies serving the California market.
The National Lime Association is the trade association for U. S. and Canadian manufacturers of high calcium quicklime, dolomitic quicklime, and hydrated lime, collectively referred to as "lime." NLA represents the interests of its members in Washington, provides input on standards and specifications for lime, and funds and manages research on current and new uses for lime.
http://www.nationalslagassoc.org/
The National Slag Association was formed in 1918 as a trade association uniting iron and steel slag producers in the United States. Over the years, the Association has become international in scope with members now coming from other countries. Membership is comprised of organizations actively engaged in iron and steel slag processing, refining, and/or the marketing of these slags. Plus, organizations that are actively involved in activities directly connected with the iron and steel slag industry such as users, manufacturer's of equipment, suppliers, and service firms.
The National Mining Association (NMA) is the voice of one of America's great basic industries - mining. It was created in 1995 as a result of the merger of two major organizations representing the mining industry at the national level: the National Coal Association and the American Mining Congress.