00314nam a2200121Ia 4500008004100000100005600041245002600097250000600123260001400129260003200143260000900175300000800184221231s9999    xx            000 0 und d  aGeetha Balakrishna R and Lakshminarayana Bhatta K.G 0aElvironmental Studies  a4  aBangalore  bSri Manjunatha Publications  c2011  a249