sci.op-research

Hi,
I'm looking books, online tutorials or other references with special
focus in modeling (specially LP, IP and MIP) real world problems (or
closest as possible), no matter which domain (telecommunications,
logistics, economics, electric circuits, inventory, human
resources, ...).
Is there a classic book in some domain? Is there a classic book about
modeling in general?
I'll appreciate your references.
thanks in advance!
hernan