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vol16no3pp67_101_889271.pdf
vol9no8pp246_268_614942.pdf
vol16no5pp133_141_233616.pdf
vol17no4pp101_105_128806.pdf
vol17no4pp112_114_74895.pdf
vol8no5pp142_172_911939.pdf
vol10no5pp169_172_161128.pdf
vol10no10pp357_367_335608.pdf
vol10no10pp368_395_703269.pdf
vol10no10pp396_401_164345.pdf