00305nam a2200097Ia 4500008004100000082001500041100002900056245008600085260002700171300000900198140113s9999    xx            000 0 und d  a543.06   L  a"William, Horwitz., Ed."  aOfficial methods of analysis of the association of official agricultural chemists  a1970bAOACcWashington  a1015