A good shell tutorial should be able to explain the use of globs to you.
BeForever has a Bash tutorial which
might give you some help.
The quick tips are:
*
matches any string
?
matches any character
[xy]
matches an x
or y
[a-zA-Z]
matches any alphabetic character
*9907[01]*[0-9]?
will match any filename of the form: