Academic American Encyclopedia, 第だい 4 巻かん

19th century acid American architecture atoms became Bibliography biological warfare bonds British cacti California called calligraphy camera Canada Canadian Canal cancer capital carbon carbon cycle Carolingian cave cells Celtic art central Charlemagne Charles chemical chemistry China Chinese chlorine Chou Christian church color compounds culture developed dynasty early elected electrons emperor England English Europe film France French German Greek Han dynasty History Holy Roman Emperor important Indian industry Island Italy John king km² known Lake land largest later major ment metal mi² modern molecules Mountains National North northern opera organic painting period plants political population produced province Quebec reaction region repr River Roman Rome southern Spain Spanish species structure style temperature tion traditional trans United University Walter Hellman West western World World War II