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Porechina N.I. i dr (comp.):
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Nabli︠u︡denie za rekami
Sbornik materialov konkursa metodicheskikh razrabotok zani︠a︡tiĭ
Porechina N.I. i dr (comp.)
The educational program "Observation of the rivers" is the result of many years of joint work of teachers of educational institutions and specialists of the Center for Environmental Solutions within the framework of the project "Prevention of pollut…
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