Here are entered works on equipment that provides the user with a safe supply of air or oxygen in an environment where air is unavailable or unsafe to breathe. Works on equipment used to provide medical care are entered under Respirators (Medical equipment)
Respiratory Protective Devices -- standards : Assessment of the NIOSH head-and-face anthropometric survey of U.S. respirator users / Committee for the Assessment of the NIOSH Head-and-Face Anthropometric Survey of U.S. Respirator Users, Board on Health Sciences Policy ; John C. Bailar III, Emily Ann Meyer, and Robert Pool, editors ; Institute of Medicine of the National Academies