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Professional Mail Surveys

Paul L. ErdosArthur J. Morgan

出版	McGraw-Hill, 1970
主題	Business & Economics / Marketing / GeneralPolitical Science / Public Opinion PollingSocial Science / MethodologySocial Science / Research
ISBN	00701957069780070195707
URL	http://books.google.com.hk/books?id=oTj5521rhBQC&hl=&source=gbs_api