European Journal of Social Science Education and Research, [S.l.], Vol 4, No 1, p. 28-34, ISSN 2312-8429, DOI: http://dx.doi.org/10.26417/ejser.v9i1.p28-34
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European Journal of Social Science Education and Research, [S.l.], Vol 4, No 1, p. 28-34, ISSN 2312-8429, DOI: http://dx.doi.org/10.26417/ejser.v9i1.p28-34
Pilns teksts pieejams šeit.