Propædia

The one-volume Propædia is the first of three parts of the 15th edition of Encyclopædia Britannica, the other two being the 12-volume Micropædia and the 17-volume Macropædia. The Propædia is intended as a topical organization of the Britannica`s contents, complementary to the alphabetical organization of the other two parts. Introduced in 19....
Found on http://en.wikipedia.org/wiki/Propædia

Propædia

(from the article `Encyclopædia Britannica`) ...The new set consisted of 28 volumes in three parts serving different functions: the Micropædia (Ready Reference), Macropædia (Knowledge in Depth), ... ...within that circle as well as its long articles on general topics must all be planned and prepared in such a way as to...
Found on http://www.britannica.com/eb/a-z/p/121
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