Procedure handbook of arc welding design and practice.

Mode of access: Internet.

How to repair and build farm equipment with arc welding.

Mode of access: Internet.

Controlling Chemical Hazards Series

Mode of access: Internet.

An experimental study of the operating characteristics and electrode heat transfer of a direct current electric arc in a pressurized argon environment,

"Purdue Research Foundation. Research project no.1717. Project Ae-33. This research was supported by the McDonnell Aircraft Corporation under Contract no. 6140-20 P. O. 7S4899-R."

Portraits in photography by the aid of flash light /

Mode of access: Internet.

Understanding your risks : identifying hazards and estimating losses.

"FEMA 386-2"--Cover.

USGS geochemical studies outline mineral potential and environmental hazards in southeastern Oregon.

Mode of access: Internet.