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Investigations undertaken at the Institute in 1958, some in co-operation with other organizations, are described.
The 90-day non-return rate of cows was found to be higher when the 15- to 22-mth-old semen used was stored in liquid air (-195° C.) than in CO2 (-77 ° C.). The survival of spermatozoa...

Utrecht: "Schoonoord " Institute for Animal Breeding Research, National Council for Agricultural Research of the Organization for Applied Scientific Research,
Het Instituut voor Veeteeltkundig Onderzoek " Schoonoord '' in 1958., 1959, pp 27 pp.

DELAWARE, 1940-41.
In work on ROCKY MOUNTAIN SPOTTED FEVER rodent trapping was carried out to ascertain the host relationships of the immature forms of Dermacentor variabilis. The meadow mouse, Microtus sp., is a common host. Other rodents had very few of these ticks. Adult D. variabilis infested...

Reports of Agricultural Experiment Stations, U.S.A. Details of the titles of these reports and of relevant papers contained in them will be found in Index Veterinanus.,

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