Designing Virtual Worlds: Volume 1
by Bartle, Richard A. Richard A. Bartle,
ISBN 13: 9781032258324
Format: paperback Publisher: CRC Press
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ISBN 13: 9781032258348
Format: hardcover Publisher: CRC Press
Designing Virtual Worlds Volume I: 1
ISBN 13: 9781041174271
ISBN 13: 9781041174288