Gerard Helferich
Books
Humboldt's cosmos
2004
ISBN 9781592400522
Unlikely Trust
2018
ISBN 9781493025770
High cotton
2007
ISBN 9781458759566
Stone of kings
2012
ISBN 9780762782543
Theodore Roosevelt and the assassin
2013
ISBN 9781493000777
Humboldt's cosmos
2004
ISBN 9781592400522Unlikely Trust
2018
ISBN 9781493025770High cotton
2007
ISBN 9781458759566Stone of kings
2012
ISBN 9780762782543Theodore Roosevelt and the assassin
2013
ISBN 9781493000777