The school is probably required to keep records for a time and then are transferred to storage. 1974 predates most computer based records. Her pediatrician, however, is responsible to keep those records for some years beyond her majority. Try her/his office first. Most of us in pediatrics keep those records forever. Remember if she is over 18years old, she as an adult must send the request for records.
Wayne Yankus, MD, FAAP
expert panelist: pediatrics