Mouths of the Chondon ONC.jpg
Defense Mapping Agency Aerospace Center, St. Louis Air Force Station, Mo.
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Mouths of the Chondon ONC, Mouths of the Chondon ONC map section, Mouths of the Chondon ONC map section
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Mouths of the Chondon ONC, East Siberian Lowland, Excerpt from Operational Navigation Chart, Chondon
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全東道の口、全東道地図区間の口、全東道地図区間の口
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東シベリア低地、全東低気圧の口、全東低気圧の航法図から抜粋
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lowlands lowland operationalism operationally