00306nam a2200109Ia 450000500170000000800410001708200140005810000180007224500520009026000460014230000080018820260224040858.0260224s9999||||xx |||||||||||||| ||und||  a363.7 RAN  aRana, S.V.S.  0aEssentials of ecology and environmental science  aNew Delhi: Prentice-Hall of India, c2005  a488