Source: Creative Problem Solving (1991), p. 2.
“Despite the importance of systems concepts and the attention that they have received and are receiving, we do not yet have a unified or integrated set (i. e., a system) of such concepts. Different terms are used to refer to the same thing and the same term is used to refer to different things. This state is aggravated by the fact that the literature of systems research is widely dispersed and is therefore difficult to track. Researchers in a wide variety of disciplines and interdisciplines are contributing to the conceptual development of the systems sciences but these contributions are not as interactive and additive as they might be.”
As cited in: Journal of systems management. Vol. 25, p. 39. Association for Systems Management, 1974.
1970s, Towards a System of Systems Concepts, 1971
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Russell L. Ackoff 70
Scientist 1919–2009Related quotes
Source: Creative Problem Solving: Total Systems Intervention (1991), p. 2
G. A. Swanson and James Grier Miller (2013) " Living Systems Theory http://www.eolss.net/Sample-Chapters/C02/E6-46-01-03.pdf" in Systems Science and Cybernetics. Vol I.

Source: Facets of Systems Science, (2001), p. 4.
Source: "Some comments on systems and system theory," (1986), p. 1-2 as quoted in George Klir (2001) Facets of Systems Science, p. 4

Introduction, p. 1
Elements of Rhetoric (1828)
Source: Society as a complex adaptive system (1968), p. 490.
Kenneth Boulding (1953) in letter to Bertalanffy, cited in: Ludwig von Bertalanffy (1968) General System Theory. p. 14
1950s