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- Copyright 2010 by the Association for Computing Machinery, Inc. Permission to make digital or hard copies of part or all of this work for personal or
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- Copyright 2009 by the Association for Computing Machinery, Inc. Permission to make digital or hard copies of part or all of this work for personal or
- Prototyping games for training and education in Second Life: Time2Play and TREG
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- Copyright 2011 by the Association for Computing Machinery, Inc. Permission to make digital or hard copies of part or all of this work for personal or
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