00289nam a2200109Ia 450000500170000000800410001708200160005810000190007424500390009326000390013230000080017120260224040853.0260224s9999||||xx |||||||||||||| ||und||  a574.503 TRI  aTrivedi, P.R.  0aEncyclopedia of world environment   aNew Delhi: APH Publications c2002  a330