TY - GEN digital ID - 139577888 TI - The Christian philosopher's circular to the Houses of Lords & Commons AU - Martin, Wm AU - Gale Cengage Learning PY - 1840 PB - [S.l. s.n. DB - UniCat KW - Safety lamps KW - Mine safety -- Equipment and supplies UR - https://www.unicat.be/uniCat?func=search&query=sysid:139577888 AB - ER -