Land in German development cooperation : guiding principles, challenges and prospects for the future / published by giz, Deutsche Gesellschaft für internationale Zusammenarbeit (GIZ) GmbH ; edited by Jorge Espinoza (Eschborn), Christian Graefen (Eschborn), Michael Kirk (Marburg), Antti Seelaff (Frankfurt am Main), Fabian Thiel (Frankfurt am Main), Willi Zimmermann (Leipzig, Germany)