Materia medica of American provings. By C. Hering M.D. J. Jeanes M.D. C.B. Matthews M.D. W. Williamson M.D. C. Neidhard M.D. S. Dubs M.D. [and] C. Bute M.D. ... Collected and arranged by t [Hardcover](Hardcover, American Institute of Homeopathy.)