@book{28195,
	author = {McGregor, J. G. and Siess, C. P.},
	title = {Strength and behavior of prestressed concrete beams with web reinforcement},
	publisher = {University of Illinois,},
	year = {1960},
	series = {Civil Enginnering Studies. Structural research series},
	address = {Urbana, Ill. :}
}