These are 15 geographical sources, you can discover the world though.

1-       Atlas of the World

Citation

Atlas of the World (10^th ed.).  (2002).  New York: Oxford University Press.

2-       Chambers World Gazetteer

Citation

Munro, David (1990)  Chambers world gazetteer : A Geographical Dictionary Cambridge(England); N.Y: Cambridge University Press.

3-       The Columbia Gazetteer of the World

Citation

The Columbia gazetteer of the world (1998) edited by Saul B. Cohen.-  New York : Columbia University Press.

4-       Guide to Places of the World

Citation

Guide to places of the world: a geographical dictionary of countries, cities, natural and man-made wonders. (1987). London: Reader’s Digest Association.

5-       Hammond Historical Atlas of the World

Citation

Hammond Historical Atlas of the World.  (1984).  Maplewood, New Jersey: Hammond, Inc.

6-       Historical Atlas of the United States

Citation

Historical Atlas of the United States.  (1988). Washington, D.C.: National Geographic Society.

7-       MapQuest

Citation

MapQuest (n.d.)  Accessed On November 11, 2009  from : http://www.mapquest.com/

8-       Merriam-Webster’s Geographical Dictionary

Citation

Merriam-Webster’s geographical dictionary (3^rd ed.).  (2001). Springfield, MA: Merriam-Webster.

9-       Atlas of the Universe

Citation

Moore, Patrick.  (1970).  The Atlas of the Universe.  New York: Rand McNally.

10-   The National Atlas of the United States of America

Citation

The National Atlas of the United States of America (1970). Washington D.C.: US Geological Survey.  The new edition on line accessed on Nov 11, 2009 from http://www.nationalatlas.gov/

11-   Rand McNally Commercial Atlas & Marketing Guide

Citation

McNally Rand (December 15, 2008) Rand McNally 2009 Commercial Atlas & Marketing Guide (140 th. ed.) Chicago: Rand McNally & Company. Retrieved on Nov.11, 2009. From : http://store.randmcnally.com/product/road+atlases/motor+carriers'+atlases/rand+mcnally+2009+commercial+atlas+marketing+guide.do 

12-   Rand McNally Road Atlas: United States, Canada, Mexico

Citation

Rand McNally Road Atlas: United States, Canada, Mexico.  (2003).  Chicago: Rand McNally.

13-   The Times Atlas of the World

Citation

The Times atlas of the world. (2007). New York: Harper Collins.

14-   The Times Atlas of World History

Citation

Barraclough, G. & Parker, G. (Eds.). (1993). The Times atlas of world history. London: Times Books.

15-   The Weather Almanac

Citation

The weather almanac. (1974). Detroit: Gale.