Encyclopedia Americana.．Volume 24，Russia to Skimmer Encyclopedia Americana.．Volume 20，Navajo to Opium Encyclopedia Americana.．Volume 25，Skin to Sumac The Encyclopedia Americana．24，Russia to Skimmer Encyclopedia Americana.．Volume 15，Indian to Jeffers Encyclopedia Americana.．Volume 23，Pumps to Russell Encyclopedia Americana.．Volume 2，Ankara to Azusa Encyclopedia Americana.．Volume 5，Burma to Cathay Encyclopedia Americana.．Volume 9，Desert to Egret Encyclopedia Americana.．Volume 26，Sumatra to Trampoline