@article{ Solr-acta16865, title = {Hierarchical levels and settlement systems in the hill region from North-Western Romania the hills of Silvania}, series = {Acta climatologica}, author = {Nicoara Liviu}, year = {2001}, url = {http://acta.bibl.u-szeged.hu/16865/1/climatologica_034_035_109-117.pdf} }