Literary research guide : an annotated listing of reference sources in English literary studies / James L. Harner.
"A selective, annotated guide to reference sources essential to the study of British literature, literatures of the United States, other literatures in English, and related topics."
Bibliography of American Literature (ProQuest)
"Recognised as one of the greatest achievements of twentieth-century scholarship, the Bibliography of American Literature describes in exhaustive detail the works of America's most important literary writers from the time of the Revolution to 1930. More than 37,000 works are listed, essentially the complete printed record of American literature from the eighteenth and nineteenth centuries."
English Short Title Catalogue (British Library)
"The 'English Short Title Catalogue' (ESTC) covers letterpress books, pamphlets, newspapers, serials, and a variety of ephemera: printed before 1801; printed in the British Isles, Colonial America, United States of America (1776-1800), Canada, or territories governed by England or Britain before 1801, in all languages; printed in any other part of the world, wholly or partly in English or other British vernaculars; or with false imprints claiming publication in Britain or its territories, in any language."
Literature criticism online
For authors from the classical world up through our own times, this resource gathers together a wide range of critical essays and
excerpts from criticism. Critical writings are typically drawn from a wide chronological range--beginning with an author's contemporaries or near contemporaries.