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T︠S︡entr ekologicheskikh resheniĭ:
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Observation of the rivers
Collection of materials for the competition of methodological development of classes
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…
36 USD
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