Context

Context of False-color-image map of quadrangles 3168 and 3268, Yahya-Wona (703), Wersek (704), Khayr-Kot (521), and Urgon (522) quadrangles, Afghanistan, by Philip A. Davis (image processing) and Kenzie J. Turner (cartography) ; U.S. Department of the Interior, U.S. Geological Survey ; prepared in cooperation with the Afghan Geological Survey and the Afghanistan Geodesy and Cartography Head Office under the auspices of the U.S. Agency for International Development, (electronic resource)
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