The MLA and YWES are the most essential sources; in their paper form they are ANNUAL (and it is necessary to look through many volumes to do an exhaustive search), but the MLA is available via FirstSearch.

 
 TITLE        MLA international bibliography of books and articles on the
                modern languages and literatures.
 EDITION      Library ed.
 PUBLISHER    New York : Modern Language Association of America, c1970-
 REF. INDEXES Leyburn Library                                             
 LIB. HAS: 1969-1992 


 TITLE        The Year's work in English studies.
 PUBLISHER    London : Published for the English Association by John Murray [
                etc.]
 PE58 .E6 Leyburn Library                                                 
  LIB. HAS: 1(1919/20)-   (Latest edition in Reference)                   


 TITLE        The New Cambridge bibliography of English literature, edited by
                George Watson.
 PUBLISHER    Cambridge [Eng.] University Press, 1969-77 [v. 1, 1974]
 SUBJECT      English literature --Bibliography.
 Leyburn-Reference      Z2011 .N45 v. 1         


 AUTHOR       Mellown, Elgin W.
 TITLE        A descriptive catalogue of the bibliographies of twentieth
                century British poets, novelists, and dramatists / by Elgin W.
                Mellown.
 EDITION      2nd ed., rev. and enl.
 PUBLISHER    Troy, N.Y. : Whitston Pub. Co., 1978.
 Leyburn-Reference      PR471 .M4 1978