Pascal is basically monomorphic: you can't define polymorphic functions or procedures. However, some of the built in functions are polymorphic (+, -, * and / for example). However, this is also true of FORTRAN so it isn't really a good example!
There is a document here which does talk about this:
http://webcourse.cs.technion.ac.il/234319/Spring2007/ho/WCFiles/05-Polymorphism.pdf[
^] Search for Pascal and you will see.