By Shriver, D. F., Atkins, P. W., D. F. Shriver, P. W. Atkins
By Williams, D. F., Schmitt, W. H.
By Mitchell, A. R., Griffiths, D. F.
By Connon, D. F.
By Conon, D. F.
By Helszajn, Joseph, McLean, D. F., J.
By Wagebaar, H. W., Plukker, D. F., Parikh, S. S.
By Bartholomew, J. Theophrastus, Gorski, Sam, Lovett, D. F.
By Tatham, Robert H., McCormack, M.D., neitzel, E. B., Winterstein, D. F.
By Hudson, D. F.
By Bratchell, D. F.