00351cam a2200133ua 4500020001800000041001000018082001800028100002000046245007300066250001200139260004900151300001200200504000500212  a0 471 99615 7  aengh  a628.3bMAR/SE  aMara, Duncan  .  aSewage treatment in hot climates / cDuncan Mara.hTextual Documents  a1 / b.  a : bEnglish Language Book Society , c1984.  a168 ; .  a