@book{22372,
	author = {Blackadder, William.},
	title = {"A direct method for the construction of influence lines for continuous girders" /},
	publisher = {The Institution,},
	year = {1931.},
	address = {London :},
	note = {TA1.I68 no. 119 bound with no. 104-135 subsequent to publication.}
}