Newsholme, S.J.; Van Ark, H.; Howerth, Elizabeth W.; Bigalke, R.D.
(Published by The Government Printer, Pretoria, 1984)
Hearts from 60 Merino sheep of known age, sex and live mass and with no known history of disease were
collected and fixed in buffered 10% formalin. Systematic light microscopical examination did not indicate any
abnormality ...