@book{4159,
	author = {Ayres, Frank.},
	title = {Schaum's outline of theory and problems of differential equations in SI metric units / },
	publisher = {McGraw-Hill Book Co., },
	year = {c1972.},
	series = {Schaum's outline series.},
	address = {Singapore : },
	edition = {1st ed.},
	note = {Includes index.}
}