1991. Universidad Nacional Autonoma de Mexico. Instituto de Geografia. North Decimal Degree 75.000000. South Decimal Degree -75.000000. East Decimal Degr... Mexico, D. F. : [s.n.], 1991.
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1977. National Geographic Society. Cartographic Division. North Decimal Degree 56.000000. South Decimal Degree 0.000000. East Decimal Degree 50.000000. W... Washington, D.C. : National Geographic Society. Cartographic Division, 1977.
2007. National Center for Ecological Analysis and Synthesis. This raster layer represents global commercial shipping activity including location and travel routes. Commercial shipping activity can lead to shi... Science.
1787. Rumsey, David, 1944- and Boulton, S. This layer is a georeferenced image of a map of Africa originally created by S. Boulton in 1787. The original map appears in 'A general atlas, desc... Cartography Associates.
1986. Euromoney Publications Ltd. North Decimal Degree 77.500000 South Decimal Degree -55.983333 East Decimal Degree 180.000000 West Decimal Degree -180.... [London] : E.S.R. Limited, 1986.