Proquest has launched their new interface.
Via findit.lu you have access to three bibliographic databases on the Proquest platform

ARTbibliographies Modern (ABM)  (1974 – current)
Modern and contemporary art – journal articles and books

International Bibliography of the Social Sciences (IBSS)  (1951 – current)
Anthropology, economics, political science and sociology – journal articles, books, reviews

ProQuest Dissertations & Theses (A&I)  (1639 – current)
Multidisciplinary – dissertations & theses

(authentification required)