Zapanta-Legros, R., Trautz, O. R., and LeGeros, J. P., Proc. Int. Assoc. Dent. Res., 42nd Gen. Meeting (1964). Elliot, J. C., thesis, University of London (1964 ...

Organisms make their skeletons from a variety of materials. Remember, "skeletons" include bone, the protein shell of crabs or insects, the sturdy shells of clams, or the massive rock secreted by coral ...