Nationally, mapping of intellectual impact of Indian research papers is now being used for policy making and monitoring scientific and social developments. Since citations received by a research paper is one of the major indicators of research impact, citation analysis and bibliometric methodologies provide the necessary quantitative and qualitative performance indicators. Not only individual researchers are mapped, but it also reflects institutional research profile together with impact of national/international collaborative endeavors. In tracking the citations in all domain areas for the period 1970-71 through 2012, the study has benchmarked the national research performance and outputs in all domains of knowledge. The detailed examination and mapping of intellectual impact have captured with complete clarity, the factors and patterns of scholarly networks and development of strategic collaborations at all levels. The document focuses on research-oriented work, which opens up new vistas for the research community. The present document is thus, a comprehensive undertaking of research and research systems on the state of research in India that encompass and goes beyond the compass of higher education. Covering the interest of a wide range of readers including scholars, professionals, researchers, faculty and policy makers, hopefully the volume will find its place in knowledge centres, institutions and all types of libraries.