Earth science an introduction حسب Hendrix, Marc S. 1963-, Thompson, Graham R., Turk, Jonathan

A concise geologic time scale 2016 حسب Ogg, James G. (James George) 1952-, Ogg, Gabi M., Gradstein, Felix M.

Available for University of the Philippines System via ScienceDirect. Click here to access
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A concise geologic time scale حسب Ogg, James G., Ogg, Gabi, Gradstein, F. M.

The geologic time scale 2012

Available for University of the Philippines System via ScienceDirect. Click here to access
Also available remotely for University of the Philippines System via ScienceDirect. Click here to access thru EZproxy

The concise geologic time scale حسب Ogg, James G. (James George) 1952-

Atlas of life on earth

Geochronology, time scales and global stratigraphic correlation. حسب Berggren, William A.

A geologic time scale 1989. حسب Harland, Walter Brian

A geologic time scale

Geologic time حسب Eicher, Don L.