@book{36738,
	author = {Mukherjee, S. and Prasanna, A. R. ed.},
	title = {Gravitation and cosmology ; proceedings of the XV IAGRG conference held at the noarth Bengal university, november 04/07/1989 /},
	publisher = {Wiley Eastern,},
	year = {1992.},
	address = {New Delhi :},
	note = {Includes Index.}
}