@book{28883,
	author = {Hardy, Ronald G.},
	title = {Application of the tri-axial type diagram to the study of concrete masonry batch mixes in plant practice.},
	publisher = {[s.n.],},
	year = {1954.},
	series = {Kansas. State Geological Survey. Bulletin 109, pt. 2. Reports of studies, 1954, pt. 2},
	address = {Lawrence :},
	note = {Title page lacking.}
}