1) S. D. C. "National Document-Handling Systems for. Science and Technology," John Willey & Sons Inc. 1966
2) F. Kodama "Vergleich von Studien zum Aufbau eines nationalen Informationssystems für Wissenschaft und Technologie in den U.S.A.," Studiengruppe für Systemforschung. 1968
3) F. Kodama "A systems Analysis on National Document-Handling Systems for Science and Technology," Studiengruppe für Systemsforschung' 1968
4) M.H. Henderson," Cooperation, Convertibility and Compatibility Among Information Systems : At Literature Review, "National Bureau of Standards, 1966