Allaby, A. and M. Allaby. (Editors). 1999. Dictionary of Earth Sciences. 2nd Edition. Oxford University press, London. (Excellent dictionary of more than 6,000 earth science terms many of which are used in physical geography - browse/buy from amazon.com or amazon.ca)

Christopherson, R. W. 2005. Geosystems: An Introduction to Physical Geography. 5th Edition. Prentice Hall, Upper Saddle River, New Jersey. (Excellent university-level textbook that focuses broadly on physical geography - browse/buy from amazon.com or amazon.ca)

Gregory, K.J. 2001. The Changing Nature of Physical Geography. Edward Arnold, London. (Very interesting university-level textbook that explores the historical evolution of thought and methods in physical geography - browse/buy from amazon.com or amazon.ca)

Harvey, M. E. and B.P. Holly, B. P. (Editors). 1981. Themes in Geographic Thought. Croom Helm, London. (Very interesting university-level textbook that explores the historical evolution of geographical thought and methods - browse/buy from amazon.com or amazon.ca)

Holt-Jensen, A. 2000. Geography - History and Concepts: A Student's Guide. 3rd Edition. Sage Publications. (Very interesting university-level textbook that explores the historical evolution of geographical thought and methods - browse/buy from amazon.com or amazon.ca)

Johnston, R. J. 1997. Geography and Geographers: Anglo-American Geography Since 1945. 5th Edition. Arnold Publishers, London. (Very interesting university-level textbook that explores the historical evolution of geographical thought and methods - browse/buy from amazon.com or amazon.ca)

Lanegran, D.A. and R. Palm (Editors). 1978. An Invitation to Geography. Second Edition. McGraw-Hill Publishing, New York. (Very interesting university-level textbook that explores the historical evolution of geographical thought and methods - browse/buy from amazon.com or amazon.ca)

Livingston, D.N. 1992. The Geographical Tradition: Episodes in the History of a Contested Enterprise. Basil Blackwell, Cambridge, Mass. (Very interesting university-level textbook that explores the historical evolution of geographical thought and methods - browse/buy from amazon.com or amazon.ca)

Lukermann, F. 1964. Geography as a formal intellectual discipline and the way in which it contributes to human knowledge. The Canadian Geographer 8(4): 167-172.

Martin, G.J. and P.E. James. 1993. All Possible Worlds: A History of Geographical Ideas. 3rd Edition. John Wiley and Sons, New York. (Very interesting university-level textbook that explores the historical evolution of geographical thought and ideas - browse/buy from amazon.com or amazon.ca)

McKnight, T. L. and D. Hess. 2002. Physical Geography: A Landscape Appreciation. 7th Edition. Prentice Hall, Upper Saddle River, New Jersey. (Good university-level textbook that focuses broadly on physical geography - browse/buy from amazon.com or amazon.ca)

Morrill, R.L. 1983. The nature, unity and value of Geography. Professional Geographer 35(1): 1-9.

Minshull, Roger M. 1970. The Changing Nature of Geography. Hutchinson, London.

Northey, M. and D. B. Knight. 2000. Making Sense: A Student's Guide to Research and Writing: Geography and Environmental Studies. 2nd edition. Oxford University Press, Toronto. (University-level textbook that helps students doing research in Geography and Environmental Science - browse/buy from amazon.com or amazon.ca)

Parker, S.P. (Editor). 2003. McGraw-Hill Dictionary of Earth Science. Second Edition. McGraw-Hill, New York. (Excellent dictionary of more than 10,000 earth science terms many of which are used in physical geography - browse/buy from amazon.com or amazon.ca)

Pattison, W.D. 1964. The four traditions of Geography. Journal of Geography 63: 211-216.

Peet, R. 1998. Modern Geographical Thought. Blackwell Publishers, Oxford. (Great university-level textbook that explores the historical evolution of geographical thought and ideas - browse/buy from amazon.com or amazon.ca)

Robinson, J.L. 1976. A new look at the four traditions of Geography. Journal of Geography 75: 520-530.

Rogers, A., H. Viles and A. Goudie (Editors). 2003. The Student's Companion to Geography. 2nd Edition. Blackwell Publishing, Oxford. (University-level textbook that helps students to broadly understand Geography as an academic discipline - browse/buy from amazon.com or amazon.ca)

Strahler, Alan H. and Arthur Strahler. 2003. Physical Geography: Science and Systems of the Human Environment. 2nd Edition John Wiley and Sons, New York. (Excellent university-level textbook that focuses broadly on physical geography - browse/buy from amazon.com or amazon.ca)

Whitlow, J.B. 2001. The Penguin Dictionary of Physical Geography. Second Edition. Penguin, Harmondsworth. (Must have reference for those wanting to learn physical geography terms - browse/buy from amazon.com oramazon.ca)