black coals

listen to the pronunciation of black coals
İngilizce - İngilizce
plural form of black coal
black coal
high quality coal

Can we this quote? Walter Hines Page, Arthur Wilson Page, The World's work, Volume 38:The drop in 1918 was also a fall in the production of black coal. In other words he losses were in the best coal, the gains in the poorer coal.

black coal
coal
black coals