The New Encyclopaedia Britannica

The Micropaedia and Macropaedia are numbered by the publisher v. 1-10 and v. 1-19 respectively.

[1] Propaedia: outline of knowledge and guide to the Britannica.--[2]-[11] Micropaedia: ready reference and index.--[12]-[30] Macropaedia: knowledge in depth.

Includes bibliographical refrences and index.