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McTighe, Jay and Wiggins, Grant (1999) The Understanding by Design Handbook. Association for Supervision and Curriculum Development, Alexandria, Virginia. ISBN ‎978-0871203403

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Tomlinson, Carol A. (1999) The differentiated classroom: responding to the needs of all learners. Association for Supervision and Curriculum Development, Alexandria, Va. ISBN 978-0871203427

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Vahid, Frank and Givargis, Tony (1999) Embedded System Design: A Unified Hardware/Software Approach. -, - (-). John Wiley & Sons, Inc, New Jersey. ISBN 0471386782