00643cam a22002414a 450000100060000000300110000600500170001700800410003404000270007504100080010204400080011008000110011810000200012924500610014926000550021030000270026565000270029265000120031965000290033165100140036065500100037470000170038436839AR-SsjUBGM20251206162009.0250720s1914    xxu           000 0 eng d  aAR-SsjUBGMcAR-SsjUBGM0 aeng  axxu  a553.611 aGrout, Frank F.10aPreliminary report on the clays and shales of Minnesota.  aMinneapolis :bThe University of Minnesota,c1914.  a172 p. :bil. ;c23 cm 4aGeología económica 4aArcilla 4aPizarra no metamórfica 0aMinnesota 4aLibro1 aSoper, E. K.