【4周达】The Negro Baseball Leagues: Tales of Umpiring Legendary Players, Breaking Barriers, and Maki... [9781683584001]

【4周达】Ruling Over Monarchs, Giants, and Stars: True Tales of Breaking Barriers, Umpiring Baseball ... [9781613210598]

【4周达】Monograph: Umpiring Security Model & Performance Improvement on Manets [9783847306214]

【4周达】Prevention of Attacks Usign Umpiring Security Model for Manets [9783848499014]

预订Tom Smith's Cricket Umpiring And Scoring:Laws of Cricket (2000 Code 4th Edition 2010)

海外直订Make Money From Umpiring Baseball Tournaments: Get Started As A Youth Umpire: Be 从棒球比赛中赚钱：开始做一

海外直订The SABR Book of Umpires and Umpiring SABR裁判和裁判手册

海外直订Understand All Aspects Of Umpiring Specific: Gain Good Reputation As A Quality U 了解裁判员的各个方面：获得

海外直订How to Umpire Baseball and Softball: An Introduction to Basic Umpiring Skills 如何裁判员棒球和垒球：基本裁

【预售 按需印刷】Prevention of Attacks Usign Umpiring Security Model for Manets