Person (person_id (PK), first_name, last_name, birthday);

Student (person_id(PK,FK to Person),...);
Staff (person_id(PK,FK to Person),job_title);
Association_member( person_id(PK,FK to Person), reg_date) ;
Resource_hire_log(resource_id, person_id (FK to Person), ....) ;

Resource_hire_log(resource_id,
 student_id (FK to Student), staff_id (FK to Staff),
 association_member_id (FK to Association_member), .... )