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Harm	Semashko, L.     Harmonius Era Calendar: The Quality of Social Existence and Future of Children [Текст] : Address to children, youth and future of children : by 27 authors from 12 countries / Semashko L., Aharoni A., Akbashev T., M.C. Azcona, R. Bachika o.a. ; International Multicultural and Multilingual Website. — St-Petersburg : State Polytechnic University Publishing House, 2006. — 384 p.
ISBN 5-7422-1203-8