1. P. Smit,Proc. Mine Med. Off. Assoc., 1968,47, 91
2. H. E. Sigerist, ‘A History of Medicine’, Vol. I, New York, 1951, p. 283 A. C. Wootton, ‘Chronicles of Pharmacy’, Vol. I, 1910, reprinted Tuckahoe, N.Y., 1972, p. 40
3. See Sigerist (2), pp. 471–477
4. See (1)
5. G. F. Most, ‘Enzyklopädie der gesammten Volksmedizin’, Graz, 1973, pp. 242–243