@book{18549,
	author = {Granhall, Ulf, and Sweden.},
	title = {Environmental role of nitrogen-fixing blue-green algae and asymbiotic bacteria /},
	publisher = {Swedish Natural Science Research Council,},
	year = {c1978.},
	address = {[Stockholm] :},
	note = {"Proceedings of an international symposium, sponsored by the Swedish Ministry of Education and the Swedish Natural Science Research Council, Uppsala, Sweden, 20-24 September 1976."}
}