Home › Articles › Outer Head – Chapter 4 – REPERTORY OF HERING’S GUIDING SYMPTOMS OF OUR MATERIA MEDICA By Calvin B. Knerr, M.D. Print ← Back to Articles Article Outer Head – Chapter 4 – REPERTORY OF HERING’S GUIDING SYMPTOMS OF OUR MATERIA MEDICA By Calvin B. Knerr, M.D. Main Main