PALMER DROUGHT INDICES AS INDICATORS OF LONG TERM STABILITY AND PERMANENCE OF SURFACE COAL MINE RECLAMATION

2001 ◽  
Vol 2001 (1) ◽  
pp. 49-59
Author(s):  
David Bickel
1984 ◽  
Vol 6 (1) ◽  
pp. 10-22 ◽  
Author(s):  
Fred J. Brenner ◽  
Martin Werner ◽  
Jeffrey Pike

2006 ◽  
Author(s):  
Rainer Gloetzl ◽  
J. Krywult ◽  
J. Schneider-Gloetzl ◽  
M. Dynowska

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