TY - BOOK T1 - Cloud by day the story of coal and coke and people A1 - Sheppard, Muriel Earley LA - English PP - Chapel Hill PB - University of North Carolina Press YR - 1947 UL - https://ds.mainlib.upd.edu.ph/Record/UP-99796217605857244 OP - 266 CN - HD 8039 M62 U6683 KW - Coal miners : Pennsylvania. KW - Coal mines and mining : Pennsylvania. KW - Coke. ER -