[Show abstract][Hide abstract] ABSTRACT: Journals are among the most prominent resources among the great range offered on the Web site of General Direction of Libraries (DGB) of the National Autonomous University of Mexico (UNAM), which serves to support the information requirements of UNAM’s community. This work begins with a financial analysis of both the print and electronic journals purchased by the DGB from 1999 to 2004. It then presents projects implemented by the UNAM’s library system for responding to the journal crisis in order to maintain an efficient service. A description follows of the agreements and activities undertaken by the libraries that carry out cooperative purchasing of information resources. The essential element among these resources are the journals, regardless of the format they are acquired in, and the main purpose is for sharing information among the 142 libraries that make up the UNAM library network.