The English Short Title Catalogue (ESTC).

http://estc.bl.uk/F/?func=file&file_name=login-bl-estc

"The English Short Title Catalogue (ESTC) lists over 480,000 items published between 1473 and 1800, mainly but not exclusively, in English, published mainly in the British isles and North America, from the collections of the British Library and over 2,000 other libraries."http://estc.bl.uk/F/?func=file&file_name=login-bl-estc, accessed 12-2016.