The Directory of U.S. coal & technology export resources. 

 - Washington, D.C. :    U.S. Dept. of Energy, Assistant Secretary for Fossil Energy, Office of Planning and Environment,    1990. 
 - 469 p. :    ill. ;    28 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Coal trade -- United States -- Directories.<br/> Energy industries -- United States -- Directories.