00385nam a2200145Ia 450000500170000000800410001702000180005808200180007610000240009424500370011825000120015526000360016730000110020365000250021420250409115927.0231217s9999 xx 000 0 und d a9788178882277 a370 KUM;1 R aKumarasena, Harsha. 0aTextbook of population education a1st ed. c2004bDominant Publ.aNew Delhi ax, 342 apopulation,education