TY  - BOOK
AU  - Olen,Harvey
AU  - Unz,Richard F.
TI  - Rotating disc biological treatment of acid mine drainage
U1  -  628.1683 
PY  - 1980///
CY  - Washington, D.C.
PB  - U.S. Government Printing Office
KW  - Acid mine drainage
KW  - Water
KW  - Purification
ER  -