The following books are recommended:
This is the primary reference in developing the notes for this course.
A good reference. Not as comprehensive, nor does it include as many examples as the others, but it is a good reference for questions of syntax and structure. The other options give more examples and better explanations.
Basically equivalent to Chapman's book, just arranged differently. Offers many examples of an engineering nature. The pages referenced in the index are not always accurate and explanations are not as clear as in Chapman's book (in the opinion of the authors of this manual).
WEBPAGES:
Michael Metcalf's Fortran 90 CNL Articles
A more in-depth Fortran guide if you want to really get involved!
A free GNU Fortran compiler for Windows, Mac OS X and Linux (click Binaries under "Quick links" and follow the instructions found there).