101 Defensive Football Drills: Volume 1-Individual Skill Drills (book) by Bill Arnsparger

101 drills to improve virtually every aspect of individual defense. Includes warm-up, agility, footwork, conditioning, blow delivery, reaction, read, tackling, and sudden change drills. Large, easy-to-read diagrams and coaching pointers accompany each drill. 2001, 124 pages.