00501nam a2200157Ia 4500003000900000008004100009020001800050040001600068080001500084245011400099260003500213300001400248650004100262650001200303700002800315IN-BaIIA211028s9999    xx            000 0 eng d  a0-12-561360-1  cIIA Library  a52-37bCHE 0aChemical evolution of the early precambriancedited by Cyril Ponnamperuma                                      aNew YorkbAcademic Pressc1977  axi, 221p.  aAstronomy and astrophysics thesaurus  aPlanets  aPonnamperuma, Cyril ed.