00309nam a22000977a 4500008004100000040005500041080001300096245003800109260004800147300001600195230717b        |||||||| |||| 00| 0 eng d  aNational Science LibrarycNational Science Library  aR 016:55  aBibliography and index of geology  aUS: bAmerican Geological Institute, c1970  a2107-3040p.