00812nam0 2200241 450 00002137320090112161451.020090112d1949----km-y0itay50------baengGBy-------001yyHuman behavior and the principle of least effortan introduction to human ecologyD. George Kingsley-ZipfCambridgeAddison-Wesley1949xi, 573 p.23 cmHuman behavior and the principle of least effort48156Ecologia umana304.219Zipf,George Kingsley449892ITUNIPARTHENOPE20090112RICAUNIMARC000021373G 304.2/1G 117DSA2008Human behavior and the principle of least effort48156UNIPARTHENOPE