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Tables are presented showing the number of cows inseminated in 1964-66, the av. N.R. rate, the number of bulls used for A.I., the ratio of ♂♂ to ♀♀ and the number of inseminated cows per bull in 43 countries in Europe, America, Asia, Africa, and in Australia and New Zealand; similar data are...

Zootechnia, 1969, 18, pp 207-226