What would Fantasy RPG's be without Dwarves? Hopefully we'll never have to find out! I certainly make no bones about it, I'm a Dwarfophile. Not sure how or why it happened, but it did. I love old and new school dwarves. If I'm not parked behind the DM Screen, I'm role-playing a bearded Denizen of the Deep Places.
My Favourite cannon on Dwarves would be "Dwarves Deep” by Ed Greenwood (1990 TSR). This is the definitive tome concerning the Dwarves of the Forgotten Realms.
It includes:
A poster size map of the Subterranean Realm
Name tables
Runes-a-plenty
Clan names
Spells
Mythology
And, a Who's-Who of Faerun Dwarvedom. A quick E-Bay search yielded several copies in the $15-$20 price range.
While this would qualify for most as Old School, Dwarves have been around for a very long time.
The first such historical references date back to Ancient Egypt. Certainly much of we know about fantasy dwarves owes itself to Norse Mythology. If you’d like to add to the list of Dwarvenly Goodness please mention them in the comments below.