00883cam a2200265   4500001001300000003000400013005001700017008004100034010002200075040003500097050001700132082001100149100002000160245006800180260002900248300006300277490004800340500005500388504002800443650001900471650002000490710003700510830005300547999001700600gs 68000280 DLC20260227111423.0700507s1968    aluab    b    00010 eng c  ags 68000280 //r84  aU.S. Geological Survey Library0 aQE471b.C569  a552/.510aClarke, Otis M.10aClay and shale of northeastern Alabama,cby Otis M. Clarke, Jr.0 aUniversity, Ala.,c1968.  a99 p.billus., maps (part col., 1 fold. in pocket)c23 cm.1 aGeological Survey of Alabama. Circular 20-C  aPrepared in cooperation with U.S. Bureau of Mines.  aBibliography: p. 37-39. 0aClayzAlabama. 0aShalezAlabama.10aUnited States.bBureau of Mines. 0aCircular (Geological Survey of Alabama) ;v20-C.  c30497d30497