Wilkins, M F Toxoplasmosis in sheep. I. Effect of a killed vaccine on lambing losses caused by experimental challenge with Toxoplasma gondii. [electronic resource] - New Zealand veterinary journal Mar 1987 - 31-4 p. digital Publication Type: Journal Article ISSN: 0048-0169 Standard No.: 10.1080/00480169.1987.35371 doi