Hal Koerner's field guide to ultrarunning : training for an ultramarathon, from 50K to 100 miles and beyond - Koerner, Hal, 1976-; Chase, Adam W. (VeloPress, 2014)
Keywords: maraton; ultramaraton; extrémní běhy; sportovní trénink; marathon; ultramarathon running; extreme runs; sports training; příručky; handbooks and manuals