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Atualizado em 13/05/2026 · De todos da iMusic
![Cover for Gerald Midgley · Systemic Intervention: Philosophy, Methodology, and Practice - Contemporary Systems Thinking (Paperback Book) [Softcover reprint of the original 1st ed. 2000 edition] (2012)](https://imusic.b-cdn.net/images/item/original/854/9781461368854.jpg?gerald-midgley-2012-systemic-intervention-philosophy-methodology-and-practice-contemporary-systems-thinking-paperback-book&class=scaled&v=1620537038)
![Cover for Gerald Midgley · Community Operational Research: OR and Systems Thinking for Community Development - Contemporary Systems Thinking (Paperback Book) [Softcover reprint of the original 1st ed. 2004 edition] (2012)](https://imusic.b-cdn.net/images/item/original/163/9781461347163.jpg?gerald-midgley-2012-community-operational-research-or-and-systems-thinking-for-community-development-contemporary-systems-thinking-paperback-book&class=scaled&v=1608770702)
![Cover for Gerald Midgley · Community Operational Research: OR and Systems Thinking for Community Development - Contemporary Systems Thinking (Hardcover Book) [2004 edition] (2004)](https://imusic.b-cdn.net/images/item/original/356/9780306483356.jpg?gerald-midgley-2004-community-operational-research-or-and-systems-thinking-for-community-development-contemporary-systems-thinking-hardcover-book&class=scaled&v=1609311067)
![Cover for Gerald Midgley · Systemic Intervention: Philosophy, Methodology, and Practice - Contemporary Systems Thinking (Hardcover Book) [2000 edition] (2001)](https://imusic.b-cdn.net/images/item/original/881/9780306464881.jpg?gerald-midgley-2001-systemic-intervention-philosophy-methodology-and-practice-contemporary-systems-thinking-hardcover-book&class=scaled&v=1408601722)