Lough, R.C.
Manual on operation of sewage treatment plants R.C. Lough - 2nd ed. - Wellington Ministry of works 1968 - 140 p.
Sewage disposal plants
628.30993 / LOU
Manual on operation of sewage treatment plants R.C. Lough - 2nd ed. - Wellington Ministry of works 1968 - 140 p.
Sewage disposal plants
628.30993 / LOU