 | R Andy I Norval, Brian Derek Perry, A. S. Young - Science - 1992 - 481 pages
Theileriosis is the name given to infections caused by several species of Theileria, the most important of which in Africa are Theileria annulata and Theileria parva. Their ... | |
 | Gwilym Owen Evans - Science - 1992 - 563 pages
The Acari, comprising mites and ticks, form one of the largest and biologically most diverse groups of the Arachnida. They are worldwide in distribution and rival the insects ... | |
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