1. Keynotes And Characteristics With Comparisons of some of the Leading Remedies of the Materia Medica
By H. C. Allen, M. D.
2. Keynotes Of The Homoeopathic Materia Medica
Dr. Adolph VON LIPPE
3. KEY-NOTES TO THE MATERIA MEDICA AS TAUGHT BY HENRY N. GUERNSEY, M.D. Late Professor of Materia Medica at the Hahnemann Medical College of Philadelphia EDITED BY JOSEPH C. GUERNSEY, A.M., M.D.