@book{4692,
	author = {Sinha, K. D. P. and Prasad, S. B.},
	title = {Prarambhik Niyamak Jyamiti = Elementary Co-ordinate Geometry / },
	publisher = {: Students Friends},
	year = {.- 1977},
	address = {.- Patna},
	edition = {7th ed.}
}