Abstract : How are open access resources treated by libraries and documentation services? Between the two tracks "gold"and "green" open access, libraries have consistently invested more in the open archives movement rather than the development of electronic journals for free access. The question that arises is the inclusion of the latter by libraries. A survey conducted in 2009 tries to answer by evaluating the visibility of OA journals published by the portal Revues.org in twenty universities in the Paris area. From contrasting results, it is possible to analyze the bottlenecks and levers for improving the inclusion of such resources by libraries.