The New Encyclopaedia Britannica.
- 15th ed.
- Chicago : Encyclopaedia Britannica, c1979.
- 30 vol. ill. 29 cm.
Includes bibliographies.
Propaedia: outline of knowledge and guide to the Britannica. 1. v.--Micropaedia: ready reference and index. 10 v.--Macropaedia: knowledge in depth. 19 v.