R. Butterfield

发表

R. Butterfield, R. T. Berg, 1976 .

R. Butterfield, E. R. Johnson, 1971, The Journal of Agricultural Science.

R. Butterfield, W. J. Pryor, 1967, Australian veterinary journal.

Rex M. Butterfield, R. Butterfield, 1988 .

R. Butterfield, 1966, Australian veterinary journal.

N. D. May, R. Butterfield, 1983 .

R. G. Matthews, R. Butterfield, R. T. Ropiha, 1967, Australian veterinary journal.

R. Butterfield, 1966 .

R. Butterfield, R. T. Berg, W. J. Pryor, 1966, Research in veterinary science.