@book{891,
	author = {Spiegel, Murray R. and Proykova, Y.},
	title = {Schaum's outline of theory and problems of theoretical mechanics :},
	publisher = {McGraw-Hill Book Co.,},
	year = {c1980.},
	series = {Schaum's outline series},
	address = {New York ;},
	edition = {SI (metric) ed. /},
	note = {Includes indexes.}
}