Columbia Encyclopedia

(Encyclopedia) Changes in English Pronunciation ...

(Encyclopedia)  Rulers of England and Great Britain(including dates of reign) Saxons and Danes House of Normandy House of Blois House of Plantagenet House of Lancaster House of York House of Tudor Ho...

(Encyclopedia)  Russian and Soviet Rulers since 1462(including dates of rule) House of Rurik House of Godunov Usurpers House of Romanov Provisional Government(premiers) Soviet Russia (1917–22) and the U...

(Encyclopedia) Periodic Table of the Elements: Actinium ...

(Encyclopedia) Periodic Table of the Elements: Aluminum ...

(Encyclopedia) Periodic Table of the Elements: Americium ...

(Encyclopedia) Periodic Table of the Elements: Antimony ...

(Encyclopedia) Periodic Table of the Elements: Argon ...

(Encyclopedia) Periodic Table of the Elements: Arsenic ...

(Encyclopedia) Periodic Table of the Elements: Astatine ...