ISBN 9781937715229 books & textbook
Hal Koerner's Field Guide to Ultrarunning: Training for an Ultramarathon, from 50K to 100 Miles and Beyond
Koerner, Hal Chase, Adam W. Jurek, Scott
VeloPress /2023-07-07 Paperback / 224 Pages
isbn-10: 1937715221 / isbn-13: 9781937715229
