بررسی جو سازمانی دبیرستان های پسرانه شهر ارومیه در سال تحصیلی 87-86

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بررسی آلودگی صوتی شهر ساری طی یک سال (87-86)

Background and purpose: Noise is one of the most harmful factors in the environment. It is also one of the harsh phenomenons in this century that people are exposed to. Exposure to noise higher than threshold limit value could cause some physical and mental disorders. High traffic flow due to recent increase in number of vehicles causes higher noise pollution. There are few studies regarding ...

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