scholarly journals Wear-resistant materials for coal conversion and utilization. Second progress report, January 1981-March 1981

1981 ◽  
Author(s):  
John E. Kelley
1980 ◽  
Author(s):  
R. Neufeld ◽  
S. Wallach ◽  
H. Erdogan ◽  
J. Bern ◽  
M. Shapiro

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