TY - BOOK ID - 134507218 TI - Updated Analysis of Longwall Pillar Stability (ALPS) computer program incorporates new Coal Mine Roof Rating (CMRR) PY - 1995 PB - Washington, DC : Bureau of Mines, U.S. Dept. of the Interior, DB - UniCat KW - Longwall mining KW - Design KW - Computer programs. UR - https://www.unicat.be/uniCat?func=search&query=sysid:134507218 AB - ER -