On this parts fiche the Bush B,radius Arm is the most specified component.
Parts such as the B-30 Rear Lower Arm Radius Arm: Rr Radius Apm 10m, Bush B,radius Arm, Bolt,lower Arm, Arm Comp,rr.lower are included in the Civic 3d 1300 1980 4speed B-30 Rear Lower Arm Radius Arm parts fiche.
This schematic depicts all components used in the Civic 3d 1300 1980 4speed B-30 Rear Lower Arm Radius Arm partslist.