Traceback
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Outlines the basic steps involved in the use of a uniform back-tagging system as a means of identifying and tracing to the herds of origin brucelliosis-infected cattle detected through blood-testing on the way to or at slaughter.
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Sources
- 16mm Filmography (legacy record) — title, year, format, sound, description, catalog record
- usgov-av-1974 — title, year, creator, length, color, sound, description
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