@book{21235,
	author = {Symposium on the Economy and Chemistry of Phosphorus},
	title = {Phosphorus in the environment, its chemistry and biochemistry /},
	publisher = {Elsevier/Excerpta Medica/North Holland,},
	year = {c1978.},
	series = {Ciba Foundation symposium ; 57 (new ser.)},
	address = {Amsterdam ;}
}