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ebrary http://site.ebrary.com/id/10308227
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Table of contents http://catdir.loc.gov/catdir/toc/fy0611/2006277850.html
Table of contents http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=015862957&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA
Table of contents http://digitool.hbz-nrw.de:1801/webclient/DeliveryManager?pid=2138504
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