References
^ Turn Right at Machu Picchu : Rediscovering the Lost City One Step at a Time by Mark Adams (2012, Paperback) ISBN 9780452297982 (revised May 2018)^ Adams, Mark (2015). Turn Right at Machu Picchu : Rediscovering the Lost City One Step at a Time, Plume. BiggerBooks. ISBN 9780452297982 (revised Nov 2023)
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