Ravizza, Ken books & textbook
Heads-Up Baseball : Playing the Game One Pitch at a Time
McGraw Hill /1998-05-11 Paperback / 192 Pages
isbn-10: 1570280215 / isbn-13: 9781570280214
Heads-Up Baseball 2.0: 5 Skills for Competing One Pitch at a Time
Hanson House /2016-01-01 Paperback / 375 Pages
isbn-10: 0578187469 / isbn-13: 9780578187464
大リーグのメンタルトレーニング
Ken Ravizza; Tom Hanson; Yōichi Kōzuma
unknown /1997-12-01 Tankobon Hardcover
isbn-10: 4583034830 / isbn-13: 9784583034836
