TY - BOOK ID - 150491361 TI - Permissible coal-cutting equipment approved prior to July 1, 1932 AU - Ilsley, L. C. AU - Brunot, Hillary Breton AU - Freeman, Howard Bassett PY - 1934 PB - Washington U.S. G.P.O. DB - UniCat KW - Coal-mining machinery KW - Coal-mining machinery UR - https://www.unicat.be/uniCat?func=search&query=sysid:150491361 AB - ER -