Image: Tractors in Antarctica (1957)
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Description: Tractors (Ferguson TE20) used by New Zealander Edmund Hillary in his transcontinental expedition across Antarctica in 1957.
Title: Tractors in Antarctica (1957)
Credit: http://www.usap.gov/; exact source
Author: Cliff Dickey, electronics technician, U.S. Navy.[1] Please also credit National Science Foundation.
Permission: This file is a work of a sailor or employee of the U.S. Navy, taken or made as part of that person's official duties. As a work of the U.S. federal government, it is in the public domain in the United States.
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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