TY  - BOOK
AU  - Penrose,Ray G.
AU  - Holubec,Igor
ED  - United States.
TI  - Laboratory study of self-sealing limestone plugs for mine openings
U1  - 553.516 
PY  - 1973///
CY  - Washington , D.C.
PB  - U.S.  Environmental protection Agency
KW  - Economic Geology
KW  - Dolomite
KW  - Limestone
ER  -