@book{17040,
	author = {GORMAN, Daniel J.},
	title = {Free Vibration Analysis of Beams and Shafts /},
	publisher = {John Wiley and Sons,},
	year = {[1975].},
	address = {New York :},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=17040}
}