Mercurius cœlicus, sive, Almanack et prognosticon vel speculum anni à nativitate J.C. 1645 [microform] : et ab astrorum creatione Kepleriana 5638 : being the first after beissxtile [sic] or leap year : wherein is contained a triple kalender, viz. the Julian, or English, the Gregorian, or forraigne, and true accompt ... / calculated exactly and composed by John Booker for the meridian of the of the famous city of London ...