Unknown Author
Virginia. General Assembly. Joint Subcommittee Studying the Effects of Longwall Mining.
Thomas M. Barczak
Dean H. Ambrose
Thomas M Barczak
Frederick K. Allgaier
P. W. Jeran
Richard J. Mainiero
Kenneth T Howard
A. J. Fejes
Christopher Mark
Vladimir Adamek
John J. McClelland
Eric R. Bauer
Jeffrey M. Listak