TY - BOOK ID - 133636892 TI - Bibliography and index of U.S. Geological Survey publications relating to coal, 1882-1970 AU - Averitt, Paul AU - Lopez, Lorreda PY - 1972 PB - Washington : U.S. Govt. Print. Off., DB - UniCat KW - Coal KW - Coal mines and mining KW - Bibliography KW - Bibliography KW - Geological Survey (U.S.) KW - Bibliography. UR - https://www.unicat.be/uniCat?func=search&query=sysid:133636892 AB - ER -