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<note xmlns="http://eprints.org/ep2/data/2.0">The article is protected by the copyright of David Publishing Company, USA. The journal is abstracted/indexed in: Database of EBSCO, Massachusetts, USA; Chinese Database of CEPS, Airiti Inc. &amp; OCLC; Chinese Scientific Journals Database, VIP Corporation, Chongqing, P.R.C.; Ulrich’s Periodicals Directory; LLBA Database of ProQuest; Summon Serials Solutions. </note>
