Knechtel, Maxwell M. 1897-1984
Bentonite deposits of the Northern Black hills district Wyoming, Montana, and South Dakota / by Maxwell M. Knechtel and Sam H. Patterson. -- Washington : United States Government Printing Office, 1962 - P. 893-1030 + map. -- (Geological Survey Bulletin ; 1082-M).
Bentonita
Estados Unidos
Yacimientos de arcilla
552.523(78)
Bentonite deposits of the Northern Black hills district Wyoming, Montana, and South Dakota / by Maxwell M. Knechtel and Sam H. Patterson. -- Washington : United States Government Printing Office, 1962 - P. 893-1030 + map. -- (Geological Survey Bulletin ; 1082-M).
Bentonita
Estados Unidos
Yacimientos de arcilla
552.523(78)