Wujing Zongyao
... that the eleventh-century Chinese military compendium Wujing Zongyao contains the earliest known written formulas for gunpowder?
... that the eleventh-century Chinese military compendium <i id="mwCVE"><b id="mwCVI"><a href="./Wujing_Zongyao" id="mwCVM" rel="mw:WikiLink" title="Wujing Zongyao">Wujing Zongyao</a></b></i> contains the earliest known written formulas for <a href="./Gunpowder" id="mwCVQ" rel="mw:WikiLink" title="Gunpowder">gunpowder</a>?