Prepn: Ashley et al., Nature 185, 461 (1960); Berg, BE 585595 (1960 to May & Baker); idem, J. Chem. Soc. 1961, 5097. Comparative efficacy: C. G. Stewart, J. S. Afr. Vet. Assoc. 54, 47 (1983); and toxicity: E. Beveridge, Res. Vet. Sci. 10, 534 (1969).
This monograph has been retired and is no longer subject to revision or update.