97th meridian west 1970-01-01
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98th meridian east 1970-01-01
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98th meridian west 1970-01-01
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99th meridian east 1970-01-01
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99th meridian west 1970-01-01
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9th meridian east 1970-01-01
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9th meridian west 1970-01-01
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Anglo-French Conference on Time-keeping at Sea 1970-01-01
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Board of Longitude 1970-01-01
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Cardo 1970-01-01
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El Hierro 1970-01-01
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Fifth principal meridian 1970-01-01
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First principal meridian 1970-01-01
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Florence meridian 1970-01-01
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Fourth principal meridian 1970-01-01
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Inter caetera 1970-01-01
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International Meridian Conference 1970-01-01
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Mason–Dixon line 1970-01-01
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Meridian (geography) 1970-01-01
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Méridienne verte 1970-01-01
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