@book{26074,
	author = {Dhar, P.K. and Chopra, P.N. },
	title = {Economic: principles and problems/by P.K. Dhar and P.N. Chopra},
	publisher = {Kalyani Publishers;},
	year = {1999.},
	address = {Ludhiana:},
	edition = {1st.ed.}
}