Uttar pradesh madhyamic shiksha parisad tatha kendreya madhyamic shiksha parishad se sambadh madhyamic vidhyalyon ke chatron ki vigyan vishay me ruchi vigyan vishay me shakshik uplabdhi tatha unke maansik swastya ke madhya sambandhon ka tulnatmak adhhayan
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BIBLIOGRAPHY P.231-239
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