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1
URL الوصول: https://explore.openaire.eu/search/
publication ?articleId=od______1575::7aa3352c211d493f9bd3671bffb5baf8
http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0041-47512010000300006&lng=en&tlng=en
URL الوصول:
https://explore.openaire.eu/search/
http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0041-47512010000300006&lng=en&tlng=en