Philosophical theories about the nature of explanation in science; from the Stanford Encyclopedia by James Woodward. Science/Philosophy_of_Science http://plato.stanford.edu/entries/scientific-explanation/
Essays on philosophy of science from the Proceedings of the Friesian School, Fourth Series. Science/Philosophy_of_Science http://www.friesian.com/science.htm
Stanford Encyclopedia entry on thesis that science discovers truths about a theory-independent reality. Science/Philosophy_of_Science http://plato.stanford.edu/entries/scientific-realism/