Pollard and Redgrave's Short Title Catalogue, the Wing Catalogue and the Thomason Tracts?
Early English Books Online: EEBO is a database of the fasimiles of books printed in English between the years 1473 and 1700. It is a collection of titles listed in Pollard and Redgrave's Short Title Catalogue (1475-1640) and Wing's Short Title Catalogue (1641-1661) and their revised editions as well as the Thomason Tracts Collection (1640-1661), and the Early English Books Tract Supplement.
From the first book printed in English by William Caxton, through the age of Spenser and Shakespeare and the tumult of the English Civil War, EEBO includes
It is a perfect database for locating primary sources for Early Modern and Renaissance Studies courses.