Hitch, C. An appreciation of systems analysis.--Hoag, M.W. An introduction to systems analysis.--Jordan, N. Some thinking about systems.--McGrath, J.E., Nordlie, P.G., and Vaughn, W.S. A descriptive framework for comparison of system research methods.--Wright, G.O. A general procedure for systems study.--Hall, A.D. Some fundamental concepts of systems engineering.--Quade, E.S. Military systems analysis.--Nikoranov, S.P. Systems analysis: a stage in the development of the methodology of problem solving in the USA.--McDonough, A.M. Information management.--Ream, N.J. On-line management information.--Kanter, J. Integrated management information and control systems.--Thome, P.G. and Willard, R.G. The systems approach: a unified concept of planning.--Jaffe, J. The system design phase.--Optner, S.L. Long-range plan for systems.--Heany, D.F. Requirements, concepts and approval.--Churchman, C. W. Systems.--Mesarović, M. D., Sanders, J.L., and Sprague, C.F. An axiomatic approach to organizations from a general systems viewpoint.--Mitchel, W. H. Relevant neoscientific management notions.--Ramo, S. Systems approach to man's future.