http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Temporary suspension of MSHA approval of the 50 psi Minova Gob Isolation Tekseal design
Temporary suspension of Mine Safety and Health Administration approval of the 50 psi MINOVA Gob Isolation Tekseal design
Program information bulletin ; no. P13-02