00349cam a2200133ua 4500020001800000041001000018082001900028100001900047245007700066250001200143260004300155300001200198504000500210  a81-219-0012-3  aengh  a628.01bDUG/EL  aDuggal, K N  .  aElements of public health engineering / cK N Duggal.hTextual Documents  a4 / b.  aNew Delhi : bS.Chand and Co , c1995.  a488 ; .  a