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)

Bras, R.L. 1990. Hydrology: An Introduction to Hydrologic Science. Addison-Wesley, Reading, Mass. (Excellent university-level textbook that examines hydrology - 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. Contains a few chapters that describe how the Earth's hydrosphere functions - browse/buy from amazon.com or amazon.ca)

Davie, T. 2002. Fundamentals of Hydrology. Routledge Publishing. (Easy reading introduction to the study of hydrology at the university level - browse/buy from amazon.com or amazon.ca)

Matthews, R. 1997. Wacky water. New Scientist June 21: 40-43.

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)

Pearce, F. 1987. Acid rain. Inside Science. New Scientist Nov. 5.

Price, M. 1991. Water from the ground. Inside Science 42. New Scientist Feb. 16.

Singh, V.P. 1997. Elementary Hydrology. Pearson Education. (Excellent university-level textbook that examines hydrology - quite technical in places - 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. Contains a number of chapters examining the operation of the hydrosphere - browse/buy from amazon.com or amazon.ca)

Sumner, G.N. 2000. Precipitation: Process and Analysis. Wiley, New York. (University-level textbook that focuses specifically on one aspect of the hydrologic system - - browse/buy from amazon.com or amazon.ca)

Viessman, W. and G.L. Lewis. 2003. Introduction to Hydrology. 5th edition. Prentice Hall, Upper Saddle River, New Jersey. (Excellent university-level textbook that examines hydrology - quite technical in places - browse/buy from amazon.com or amazon.ca)

Watson, I., A.D. Burnett ,and A.D. Watson. 1993. Hydrology: An Environmental Approach. Lewis Publishers. (Excellent university-level textbook that examines hydrology and hydrogeology - quite technical in places - 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 or amazon.ca)