@book{3559,
	author = {Vohra, K. G.},
	title = {Natural radiation environment /},
	publisher = {Wiley Eastern Limited ,},
	year = {c1982.},
	address = {New Delhi :},
	note = {proceedings of the Second Special Symposium on Natural Radiation Environment held at Bhabha Atomic Research Centre Bombay 400 085, India during January 19-23, 1981}
}