2 可以通过以下链接request,很可能免费:
http://www.emeraldinsight.com/Insight/manulDocumentRequest.do?hdAction=ref_document_request&r_contentId=0&r_atitle=&r_jtitle=Air%20Quality&r_issn=&r_year=1997&r_volume=&r_issue=&r_startpage=32-43&r_endpage=&r_publisher=Lewis%20Publishers&r_authors=Godish,%20T.