@book{30855,
	author = {PILKEY, Walter D. and WUNDERLICH, Walter},
	title = {Mechanics of structures :},
	publisher = {CRC,},
	year = {1994.},
	address = {Boca Raton :},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=30855}
}