Traceback

Duration: 13 min

Year Published: 1960

Creator: Motion Pictures Serv Room 1850 South Bldg

Format: 16mm

Color: Color

Sound: sound

Description: 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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