@book{20436,
	author = {Sawko, F.},
	title = {Developments in prestressed concrete 1 /},
	publisher = {Applied Science Publ.,},
	year = {1978.},
	address = {London :},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=20436}
}