q=%E6%95%B0%E5%AD%A6&searchType=standard&isFacet=true&view=standard&searchWay=subject&rows=10&sortWay=score&sortOrder=desc&f_author=杜能&f_author=(德)约翰·冯·杜能(johann heinrich oun thunen)著&searchWay0=marc&q0=&logical0=ANDrows=10&searchWay0=marc&q0=&logical0=AND