Razlike između izmjena na stranici "Klaudije Ptolomej"

=== Sekundarni materijal ===

* [http://www.skyscript.co.uk/ptolemy.html Ptolemy at SkyScript] - ''The Life and Work of Ptolemy''

* [http://obs.nineplanets.org/psc/theman.html Ptolemy biography] (Bill Arnett's site)

* [http://www.fiks.de/rom/index.htm?rom10.htm Ptolemy's Geography of Northwestern Europe]

* [http://www.newberry.org/smith/slidesets/ss08.html History of Cartography] including a discussion of the Geographica

* [http://www.csiss.org/classics/content/76 Claudius Ptolemaeus (Ptolemy): Representation, Understanding, and Mathematical Labeling of the Spherical Earth]

* [http://www.mlahanas.de/Greeks/Eratosthenes.htm Eratosthenes of Cyrene - Some Remarks]