by Esser R.P, Simpson S.E, Snell R.R
Published in Citrus Industry (1984)

by Ridings W.H, Schenck N.C, Snell R.R, Keen W.M, Cornell J.A
Published in Proceedings of the Florida State Horticultural Society (1977)

by Snell, R.R, Keen, J.E, Bradley, S, Johnson, J.L
Published in Large animal practice (1999)

by Tillman, F.A., Pai, D.K., Funk, M.L., Snell, R.R.
Published in Transportation research (01.01.1968)