Reinecke, R.K.; Snijders, A.J.; Horak, Ivan Gerard; Jansen, B.C.
(Pretoria : Government Printer, 1962)
1. The modified critical test, or so-called short-term slaughter test, was the most suitable means of assessing anthelmintic efficacy on adult Trichostrongylus spp. and O. columbianum. It has some value for O. circumcincta ...