This article identifies externally available timelines related to the exploration of the Antarctic. It will also includes links to a number of timelines within this site itself.
A timeline to 1900 is provided here: Antarctic Exploration Timeline to 1900.
From an alternative full timeline see: Antarctic Exploration Timeline
Online resources include:
Wikipedia: http://en.wikipedia.org/wiki/List_of_Antarctic_expeditions with a more detailed list of expeditions between 1897 and 1922 at http://en.wikipedia.org/wiki/Heroic_Age_of_Antarctic_Exploration
The definitive book is Chronological List of Antarctic Expeditions, Robert Headland