हरित छत प्रविधि, वातावरण र काठमाडौ उपत्यका
डा. बिनोद बानिया । सन् १९६१ मा जर्मन वैज्ञानिक रेर्नहार्ड वर्नकाम ले हरित छत प्रविधि (Green Roof Technology) सम्बन्धी आफ्नो…
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