silver mining industry
...that through 1981, Arizona's silver mining industry had produced a cumulative total of 490 million troy ounces of silver?
...that through 1981, <a href="./Arizona" id="mwEHM" rel="mw:WikiLink" title="Arizona">Arizona</a>'s <b id="mwEHQ"><a href="./Silver_mining_in_Arizona" id="mwEHU" rel="mw:WikiLink" title="Silver mining in Arizona">silver mining industry</a></b> had produced a cumulative total of 490<span id="mwEHY" typeof="mw:Entity"> </span>million <a href="./Troy_weight" id="mwEHc" rel="mw:WikiLink" title="Troy weight">troy ounces</a> of <a href="./Silver" id="mwEHg" rel="mw:WikiLink" title="Silver">silver</a>?