0 Collins, R. C. Dewhirst, L. W. 1965 Some effects of the sucking louse, Haematopinus eurysternus on cattle on unsupplemented range Journal of the American Veterinary Medical Association 146 129-132 40424 Troester Haematopinus eurysternus ecology cattle "Bis 12; 3 % der Rinder einer Herde k