Let L p be a Banach function space, i.e. a Banach space of (equivalence classes of) measurable point functions on a (r-finite measure space (12, 2,/i), with p being a function norm possessing at least the weak Fatou property. The results obtained concern integral representations of bounded linear operators from a Banach space 9C to L p and from L p (or a subspace) to 9C. These results in some cases complement and in other cases generalize work done in