Occupational exposure to radon progeny in underground mines.

Mode of access: Internet.

Underground insulated piping systems : excluding walk-in tunnels.

"Prepared under Contract No. CST 263 between the National Academy of Sciences and the National Bureau of Standards."

Morse's manual of art : a self teacher in all branches of deocrative art, embracing almost every variety of painting and drawing, on china, glass, velvet, canvas, paper and wood : the secret of all glass transparencies, sketching from nature, pastel and crayon drawing, etc. : illustrated /

Mode of access: Internet.

State-of-the-art procedures and equipment for internal inspection of underground storage tanks /

Mode of access: Internet.

Underground injection wells and your drinking water.

Mode of access: Internet.

Processes affecting subsurface transport of leaking underground tank fluids /

"CR 810052."

Musts for USTs : a summary of the new regulations for underground storage tank systems.

Mode of access: Internet.

Volumetric leak detection in large underground storage tanks /

Mode of access: Internet.

More about leaking underground storage tanks : a background booklet for the chemical advisory /

Mode of access: Internet.

Hazards and protection of underground transformer installations /

Mode of access: Internet.

Computer applications in underground mining systems : final report : prepared for Office of Coal Research, Dept. of Interior ... /

"Period of performance: September, l968- December, 1973."