@book{1134,
	author = {Johnson, Carl G.},
	title = {Forging practice : A Practical treatise on hand forging of wrought iron, machine steel, and tool steel; drop forging; and heat treatment of steel, including annealing, hardening},
	publisher = {Technical Press},
	year = {1947},
	address = {London},
	edition = {1st}
}