Prof. Sounds' Drum Tuning Bible
If you haven't seen this yet, you're in for a treat. J. Scott Johnson of Indianapolis (aka Professor Sound) has assembled a major collection of information about everything that affects the sound of a drum: wood type, construction, tuning and seating, head type, drum size, bearing edges, shell interior -- more information than most may have though possible. And it's all available at his website Prof.Sound's Drum Tuning Bible v3. Check it out.