. . . . "The proliferation of new information resources, the rapid development of access and retrieval methods associated with them, and the unprecedented creation of global electronic information and communication resources have made the Internet an important component of many users' information environments. A number of RADAR tools (Resource Access, Discovery and Retrieval) have emerged which facilitate the creation, discovery and use of network resources: they allow users to 'publish' on the network, to browse and search for resources of interest, and to organise or create custom views of resources. Several important development trends of RADAR systems are identified, regarding: Integration of Internet resource discovery systems ; integration of Internet and other resource discovery systems ; sustainable resource discovery services. The article examines these trends, and will give a brief general introduction to network resource discovery issues and developments, suggest some ways in which integrated resource discovery systems are likely to develop, focusing on the interface between library and Internet systems. A number of recent European developments in this area will be reported, and the article examines the emergence of sustainable resource discovery systems in the overall context of emerging Internet services."@en . . "Network resource discovery a European library perspective"@en . . . . . . . . . . . . .