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During 3 experimental periods each of one year (from 1972 to 1976) the numbers of gastrointestinal nematodes in 2 groups of calves, reared on the savanna of Mato Grosso, Brazil, were assessed by faecal and post-mortem examinations. One group of calves was naturally infected (untreated) and the...

Melo, H. J. H. de; Bianchin, I.
Pesquisa Agropecuaria Brasileira, 1977, 12, pp 205-216