HKL = R. Borger, Handbuch der Keilschriftslitteratur:
Band I, 1967: Repertorium der sumerischen und akkadischen Texte.
Band II, 1975: Supplement zu Band I.
Band III, 1975: Inhaltliche Ordnung … Sekundärliteratur in Auswahl.
Register Assyriologie und Bibliographie Mesopotamien (special volumes of Archiv für Orientforschung [AfO])
AfO on JSTOR
Online catalogue of the Gelb Memorial Library. With over 3000 monographs and an offprint collection of 10,000 articles, the Gelb Library represents easily the most significant collection of Assyriological publications west of the University of Chicago.
The Sackler Library, a part of the Bodleian Libraries in Oxford holds the largest British collection of Assyriological literature. The Oxford Catalogue is searchable online.
Resources in France: Ressources sur l'Antiquité (Réseau FrantiQ)