Encyclopædia Britannica
Compton's by Britannica

Britannica Student Encyclopedia
My First Britannica
Britannica Discovery Library
Discover America
Gran Enciclopedia Planeta
Britannica Enciclopedia Universal Illustrada
Great Books of the Western World
Encyclopædia Britannica World Atlas
Britannica Concise Encyclopedia
Encyclopædia Britannica Almanac
Britannica Book of the Year
Merriam-Webster Dictionaries