@book{1020,
	author = {Y.mido , M.satake M.s Sethi , S.A.Iqbaal },
	title = {Chemicals in the Environment },
	publisher = {Discovery Publishing House },
	year = {1995},
	note = {The teaching of chemistry at the introductory stage becomes each day a more challenging task as the subject matter becomes more diverse and more complex }
}