https://www.mass.gov/rules-of-appellate-procedure/appellate-procedure-rule-17-brief-of-an-amicus-curiae
Appellate Procedure Rule 17: Brief of an amicus curiae | Mass.gov
an amicus curiaeappellate procedurerule 17brief
https://www.mass.gov/districtmunicipal-courts-rules-for-appellate-division-appeals/rule-17-brief-of-an-amicus-curiae
Rule 17: Brief of an amicus curiae | Mass.gov
an amicus curiaerule 17briefmass