Opals from a Mexican mine.

The greatest of the Gods is Quetzalcoati.--The water lady.--The mysterious disappearance of Mrs T. Tompkins Smith.--The vision of Don Juan on the Piedra de los Angeles.--Cosmopolitana mexicana.

Minés.

Mode of access: Internet.

Effectiveness of surface mine sedimentation ponds /

Mode of access: Internet.

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."

Design manual : neutralization of acid mine drainage /

Mode of access: Internet.

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

Mode of access: Internet.

Report of Frank Farrington, President, district number twelve, United Mine Workers of America /

Mode of access: Internet.

Proceedings of the Anthracite mine strike commission,

"Reprinted from The Scranton Tribune, 1902-03."