As an undergrad at the University of Alberta I had access to the entire Corpus Reformatorum collection of Calvin’s writings. When I moved to Hamilton in 1996, I expected to be able to find it at our seminary library, and if not there, then certainly at the Mills library at McMaster University. Neither had it. This made me realize that this set is extremely rare and difficult to come by. Flash forward to 2010 and the whole set is now available online. The Post-Reformation Digital Library has all the links you need. We live in a curious age, a time in which we have an embarrassment of riches as far as primary source documents is concerned, but a growing impoverishment in the skills needed to take advantage of them, i.e. the ability to read Latin or Middle French with some proficiency.