Caterpillar D4 Antarctica 1957.JPG
United States Navy.  Note that while Caterpillar sent the photo with information to the press, the company credited the U.S. Navy for the photo.
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Caterpillar D4 Antarctica 1957, Caterpillar D4
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en
Caterpillar D4 Antarctica 1957, Photo of a Caterpillar D4 tractor pulling newly delivered supplies to the base station at the Antarctic.
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虫D4 南極大陸 1957, 虫D4
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キャタピラーD4南極a1957、新しく届けられた物資を南極基地に引き上げるキャタピラーD4トラクターの写真。
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triode pull back tracked vehicle