1.
Challenges of a Changing Earth : Proceedings of the Global Change Open Science Conference, A...
by Steffen, Will, J�ger, Jill,...
ISBN: 9783642624070
List Price: $189.00
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From Edison To Marconi The First Thirty Years Of Recorded Music
by Steffen, David J.
ISBN: 9780786420612
List Price: $39.95