The Big Book of Endurance Training and Racing

Training Essentials for Ultrarunning

Koop Jason

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Cover of Training Essentials for Ultrarunning

Hal Koerner's Field Guide to Ultrarunning: Training for an Ultramarathon, from 50K to 100 Miles and Beyond

Koerner Hal

amazon.com
Cover of Hal Koerner's Field Guide to Ultrarunning: Training for an Ultramarathon, from 50K to 100 Miles and Beyond