I'm looking for a text book which has detailed explanations on the subject. If you know it, please let me know. Since I don't have an easy access to a university library, I prefer a book which can be bought(and not so expensive) in an online bookstore like Amazon. Of course, free downloadable books are welcome! Thanks.
EDIT I'm particularly interested in the theory of harmonic integrals on non-compact complete Kähler manifolds.