What has the author Christian Spiess written?

Christian Spiess has written:

'Sozialethik des Eigentums: philosophische Grundlagen - kirchliche Sozialverk undigung' -- subject(s): OUR Brockhaus selection, Christentum, christliche Dogmatik

'Freiheit, Natur, Religion' -- subject(s): Applied ethics, Social ethics, Christian ethics