British Association of Softball Umpires (BASU)
Umpiring Resources
2018-2021 Slow pitch softball playing rules
2018-2021 softball rule changes
2021 April Slow Pitch Case Book
2020 April Slow Pitch Case Book
WBSC Softball Field Mechanics Slow Pitch 1 Umpire System
WBSC Softball Field Mechanics Slow Pitch 2 Umpire System
