First to last BALL references:

https://qmap.pub/read/1510 15 Jun 2018

https://qmap.pub/read/1866 14 Aug 2018

https://qmap.pub/read/2397 3 Nov 2018

https://qmap.pub/read/3222 27 Mar 2019

https://qmap.pub/read/4360 30 May 2020

https://qmap.pub/read/4384 1 Jun 2020

https://qmap.pub/read/4488 21 Jun 2020