00675nam a22002177a 450000500170000001000140001702000100003103500140004103700160005504000120007108200150008310000220009824500660012026000430018627000530022930000330028249000310031550000510034665000270039765000330042420170124110024.0  aTA-004750  c15.00  aTA-004750  bCen Lib/Ret  aDPLbEN  a551.7bWEL  aWeller, J. Marvin  aStratigraphic principles and practice /cby J. Marvin Weller   aNew Delhi bUniversal Book Stallc1960  bNew Delhi a5, ansari road, dariya ganj e110002  axvi, 725p. ;c22cm(Hb)bill.  aHarper's geoscience series  aIncludes bibliographical references and index   aStratigraphy and time   aDevelopment of Stratigraphy