1. Geography and skin colour
2. Sir Edward Mellanby, G.B.E., K.C.B., F.R.S.
3. McCollum EV, Pitz W, Simmonds N, Becker JE, Shipley PG, Bunting RW. The effect of additions of fluorine to the diet of the rat on the quality of the teeth. 1925. Studies on experimental rickets. XXI. An experimental demonstration of the existence of a vitamin which promotes calcium deposition. 1922. The effect of additions of fluorine to the diet of the rat on the quality of the teeth. 1925. J Biol Chem 2002; 277: E8
4. History of the discovery of vitamin D and its active metabolites
5. The production of vitamin D in a glow discharge