@book{21132,
	author = {Prescott, G. W.},
	title = {How to know the freshwater algae},
	publisher = {W. C. Brown},
	year = {c1978.},
	series = {The Pictured key nature series},
	address = {Dubuque, Iowa},
	edition = {3d ed.},
	note = {Includes index.}
}