Spiral-point twist drills: A comparison with conventional-point drills when drilling cast iron and alloy steel.
Chicago Style (17th ed.) CitationSpiral-point Twist Drills: A Comparison with Conventional-point Drills When Drilling Cast Iron and Alloy Steel. [Melton Mowbray, Leicestershire : The Association, 1961?].
MLA (8th ed.) CitationSpiral-point Twist Drills: A Comparison with Conventional-point Drills When Drilling Cast Iron and Alloy Steel.
Warning: These citations may not always be 100% accurate.