00499nam a2200169 a 450000100080000000500110000800800410001910000170006024500890007726000400016630000080020649000450021465000130025965300140027265300250028670000180031112925441999-09-02       1980    bl uuuu     u0uu1 u    #d1 aWHITE, E. H.  aSulfate-sulfur content and pH of rainwater at a forested site in Northern Minnesota.  aSt. Paul: College of Forestryc1980  a3p.  a(Minesota Forestry Research Notes, 275).  aFloresta  aAcid rain  aChuva acida: Forests1 aKRAMER, C. F.