00290nam a2200109Ia 450000500170000000800410001708200120005810000170007024500440008726000410013130000080017220260224040858.0260224s9999||||xx |||||||||||||| ||und||  a630 KUM  aArvind Kumar 0aEnvironmental pollution and agriculture  aNew Delhi: A.P.H. Publicationsc2002  a531