Dwarves (1982)

From cover:

DWARVES The Stoutest Warriors in the Age of Legend. Herein is recorded their History, Gods, Culture, Artifacts, Wars, Magics, Mines, Traps, and Enemies. Including Guides to the Ancient Cities of Ostohar and Anor, the village of Fin, and the residents therein. Featuring: DWARVEN RITE, a heroic sized adventure for 4-8 Dwarven characters of 5th to 10th level of experience. This adventure is suitable for use with AD&D.

From the web:

Dwarves details all aspects of an entire kingdom of dwarves. Maps and descriptions of 3 dwarven cities are included, as is an adventure for 4-8 dwarven characters of skill levels 5-10.