Coal reprint... written by Wilbert G. Fritz

"The Coal article from the World Book Encyclopedia was prepared with the cooperation of the National Coal Association. It was written by Wilbert G. Fritz, M.B.A., Formerly consultant on Materials, Office of Defense Mobilization, Executive Office of the President, Washington D.C. and was critically reviewed by M. Edmund Speare, Ph.D., Educational Director, National Coal Association." -- cover.

Pages 1503-1524 reprinted from The World Book Encyclopedia 1955.