Stiens, G. (1983). On the Future of Spatial and Settlement Structures: Long-Term Projections of Developments in the Federal Republic of Germany.
Παραπομπή σε μορφή Chicago (17η εκδ.)Stiens, Gerhard. On the Future of Spatial and Settlement Structures: Long-Term Projections of Developments in the Federal Republic of Germany. Bonn, 1983.
Παραπομπή σε μορφή MLA (8th εκδ.)Stiens, Gerhard. On the Future of Spatial and Settlement Structures: Long-Term Projections of Developments in the Federal Republic of Germany. 1983.
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