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E.Halley World Chart of the equal declination. ru en World Chart of the equal declination Halley Halley Tabula Totius Orbis Terrarum Exhibens Declinationes Magneticas ad Annum composita ab Edmundo Halleyo Simul cum Inclinationibus Poundio Observatis et Ventis Universalibus Paris Halley other versions File Nova accuratissima